kidzcar babysitting service documentation.docx

7/31/2019 Kidzcar Babysitting Service Documentation.docx

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Navraj Bains A2 WJEC ICT

Kidzcare Babysitting

Service

Navraj Bains

2/25/2012


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Table of Contents1. User Requirements ......................................................................................................................... 6

1.1 Background ............................................................................................................................. 6

1.2 Aims and objectives ................................................................................................................ 6

1.1.1 Ethos and How style of the business. ............................................................................. 6

1.3 Expected outcomes in terms of calculations. ......................................................................... 7

1.4 Other expected outcomes. ..................................................................................................... 8

1.1 Hardware Requirements. ...................................................................................................... 10

2. Design ............................................................................................................................................ 13

2.1 Data Dictionary ........................................................................................................................... 13

2.1.1 Customers Table ........................................................................................................... 13

2.1.2 Childrens Table .............................................................................................................. 14

2.1.3 Child_Carers Table ........................................................................................................ 15

2.1.4 Carer Working Hours Table ........................................................................................... 16

2.1.5 Holidays Table ............................................................................................................... 16

2.1.6 Bookings Table .............................................................................................................. 17

2.1.7 Payments Table ............................................................................................................. 18

2.1.8 Prices Table ................................................................................................................... 18

2.2 Normalisation Tables .................................................................................................................. 19

2.3 Design of Validation techniques ................................................................................................. 21

2.3.1 Validation techniques .......................................................................................................... 21

2.4 Design of security/password protection technique ............................................................. 22

2.5 Design of on screen data....................................................................................................... 23

2.5.1 Entry forms .................................................................................................................... 23

2.5.2 Form with sub form Carers Form ............................................................................... 24

2.5.3 Design of user-friendly, menu driven, front end interface. .......................................... 25

2.6 Design of Queries .................................................................................................................. 28

2.7 Design of report .................................................................................................................... 31

2.8 Design of Automated Routines ............................................................................................. 32

2.8.1 Routine 1 Calculate the Age of ta child ...................................................................... 32

2.8.2 Routine 2 Calculate the Cost ...................................................................................... 33

2.8.3 Routine 3 Ensure Keys fields have values entered. .................................................... 34

3 Implementation ............................................................................................................................ 35

3.1 Evidence of Relational Links diagram ................................................................................... 35


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3.2 Create tables and links .......................................................................................................... 36

3.2.1 Child Carers Table ......................................................................................................... 36

3.2.2 Customers Table ........................................................................................................... 37

3.2.3 Payments table ............................................................................................................. 38

3.2.4 Childrens table ............................................................................................................. 39

3.3 Two data validation techniques ............................................................................................ 40

3.3.1 Validation technique 1 .................................................................................................. 40

3.3.2 Validation technique 2 ................................................................................................. 42

3.4 Automated Routines ............................................................................................................. 44

3.4.1 Childs Age Calculation ................................................................................................... 44

3.4.2 Calculate Total cost of Booking ..................................................................................... 46

3.4.3 Ensure that Key fields are Populated ............................................................................ 48

3.1 Forms Implementation ......................................................................................................... 50

3.1.1 Customers Form ............................................................................................................ 50

3.1.2 Childrens Form .............................................................................................................. 58

3.1.3 Carers Form with a Sub-form ........................................................................................ 66

3.2 Macros .................................................................................................................................. 67

3.2.1 About Macro ................................................................................................................. 67

3.2.2 Splash Macro ................................................................................................................. 69

3.3 Queries .................................................................................................................................. 71

3.3.1 Single Table Query - CustomerListQry .......................................................................... 71

3.3.2 Single Table Parameter Query - ChildrenQry ................................................................ 73

3.3.3 Multi Table Parameter Query - ChildrenRepQry .......................................................... 74

3.3.4 Multi Table Parameter Query - CustomerQry............................................................... 76

3.3.5 Multi Table Parameter Query - CarerQry...................................................................... 77

3.3.6 Single Table Parameter Delete Query DeleteChildrenQry ......................................... 783.4 Creating Customers Report ................................................................................................... 79

4 Testing ........................................................................................................................................... 86

4.1 Test Plan ................................................................................................................................ 86

4.2 User Interface and test all routes through the system ......................................................... 89

4.3 Data entry with Valid Data .................................................................................................... 90

4.3.1 This validation technique is a data type validation technique. .................................... 94

4.3.2 Check for a valid Email Address ................................................................................... 95

4.4 Testing Automated Routines ................................................................................................ 96


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4.4.1 Age Calculation Testing ................................................................................................. 96

4.5.2 Total Cost Calculation and Check for Null data fields .................................................. 98

4.6 Report Testing ....................................................................................................................... 99

4.7 Database Queries Testing ................................................................................................... 101

4.7.1 Single Table Query CustomerListQry ....................................................................... 101

4.7.3 Testing Multi Table Parameter Query - ChildrenRepQry ............................................ 104

4.7.4 Testing Multi Table Parameter Query - CustomerQry ................................................ 106

4.7.5 Testing Multi Table Parameter Query - CarerQry ....................................................... 108

4.7.6 Testing Single Table Parameter Delete Query DeleteChildrenQry .......................... 110

5 User Documentation. .................................................................................................................. 116

5.1 Opening and using the application ..................................................................................... 116

5.2 Details of how to enter passwords or other security procedures ...................................... 117

5.2.1 Changing usernames and passwords: ......................................................................... 117

5.3 Making a Booking ................................................................................................................ 126

5.4 Adding and amending child carer details ............................................................................ 128

5.5 Examples of Data Validation ............................................................................................... 132

5.5.1 Data Type checking ..................................................................................................... 132

........................................................................................................................................................ 132

........................................................................................................................................................ 132

5.5.2 Format check Validation ............................................................................................. 133

........................................................................................................................................................ 133

........................................................................................................................................................ 133

5.6 How to Run Database Queries ............................................................................................ 134

5.6.1 Queries in the System ................................................................................................. 134

5.6.2 Running Queries .......................................................................................................... 135

How to Print Reports. ..................................................................................................................... 1385.7 Disaster Recovery Techniques ............................................................................................ 140

5.8 Backups ............................................................................................................................... 140

5.9 Standby system ................................................................................................................... 140

5.10 Anti Virus Software ............................................................................................................. 140

6 Evaluation ................................................................................................................................... 141

6.1 Against User requirements ................................................................................................. 141

6.2 Objectives of new system ................................................................................................... 141

7 Problems encountered & strategies used to resolve them. ....................................................... 146


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1. User Requirements

1.1 Background

Kidzcare Babysitting Service is run by Kinda Lally and is based in Slough. She has a number

of carers who baby-sitting children for parents with busy lifestyles. It is a fairly new business,

set up six months ago, but they have become more established and are quickly expanding. At

present the Kidzcare Babysitting Service mind children in parts of London, Berkshire and

Buckinghamshire. Miss Lally currently has eight full time and part time carers and the

number of customers is still growing.

Miss Lally currently keeps a note of customers and carers manually but would prefer to have

a more professional and practical system, which would make it easier to find customer and

carer details. Customer and carer details are written on index cards and stored in a box in

alphabetical order. She wished to update her current system as it occupies a great deal of

space and is extremely time consuming to search through customer records. When a customerrings Kidzcare Babysitting Service to book a day for a carer, the bookings are noted down on

paper and filed away. The customer is then sent a written receipt copied from a template, to

their postal address. Miss Lally wants to update to a computerised system and produce more

professional invoices or reports instead of receipts. She hopes to send these reports directly to

the customers email addresses to reduce the risk of delivery failure.

As the system is so disorganized, sometimes carers get double booked resulting in stress for

the carers and unhappy customers. As Miss Lally doesnt want to lose her carers or customers

it is crucial for her to have a system, which stops double bookings from happening, and

informs the user when the carer is free. Due to bookings being made manually some bookings

are sometimes lost, which is something Miss Lally would like to change in the new system.

Miss Lally is fairly experienced with computers and is extremely enthusiastic to introduce a

computerised system for Kidzcare Babysitting Service; however other staff members have

limited skills and therefore a system that is balanced for all user expertise.

1.2 Aims and objectives

1.1.1 Ethos and How style of the business.

As the business sector that Miss Lally is in scrutinised by the parents who leave their children

with the day care centre she must ensure that her ethos and how style is reflected in a positive

way. It is imperative that the parents feel safe and secure with leaving their children at this

day-care centre. The colour scheme that Miss Lally has opted for is Multi-coloured for the

logo and a purple colour for the general background. I believe that these colours represent

Miss Lallys ethos as the multi-coloured logo represents diversity and the purple being Good

judgement and peace of mind.


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The how style:

Use of logo - The logo of this business like stated before will have a multi-coloured

colour scheme. It will have a font that is suited towards a childs perspective in the

sense that it is colourful.

Use of wordsThe way the business name will be spelt will be Kidzcare baby sitting

service; I believe that this name is reflective of the ethos of the business.

Use of colourThe colour scheme that I have opted for is multi-coloured as well as

purple. These coloured will be consistently used throughout the business on the

database as well as the documents.

Writing styleClearly the writing style as the colour scheme will have to remain the

same a consistent throughout the whole business, in terms of the documents and

database tables. The writing style that I will use is formal use of English.

Aims.

Provide a system where all staff members with limited skills can use.

Turn all paperwork in a computerised database.

Keep in line with rules and regulations, which will be increased by the use of

passwords on a new system.

Prevent double bookings, of both carers and parents children.

Objectives

Data storage.

I will store data about all Staff members who work for the business, alongside the

parents details and the childs details.

I will store details about every booking that has been made by parents, and who is the

carer that has been designated towards that child(s), and where the address of the

parents is.

I will store details about how many carers are available to work, this means also

storing details about carers holidays and sick leave.

1.3 Expected outcomes in terms of calculations.

One calculation that needs to be made would be the cost for customers. This would be

worked out by using the formula (Hours worked*Hourly wage) this may change

depending on the children being cared for.

The calculation for the total revenue of the business must be taken weekly; this is

calculated by taken a percentage of the costs for the parents.


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1.4 Other expected outcomes.

Another expected outcome may be the financial data needed; this may be the financial

data for the whole week. The ability to bring new or temporary staff carers in case of emergencies, who can

adapt to using the new system quickly.

A list for special needs children that may need special help and may need more

experienced carers to carry out the baby sitting service.

A table for complaints, that may need to be attended to, which may include

disciplinary procedures as code and conduct, has not been abided by the staff

members.

An order dated list that has all the bookings with customers service questionnaire.

Expected Outcomes/aims and objectives

Data capture and inputs

The data that will be entered will be entered manually by the user. It will be entered on the

data entry form such as, the bookings form which will have field available for the user to

capture these data. When a booking is being made for re-occurring customers who already

have their details on the system the user just has to enter the time and date. And then select a

carer that is available during that time. On the payments section of the booking form theymust enter the card number, issue number, and expiry date and beginning date. The user will

have to enter all data in on the data entry forms manually, except the data on the booking

form on the carer details which will come from a drop down box.

Processes

Security

As the database will contain very sensitive information


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1.1 Hardware Requirements.

The end user I am designing my system for has a Dell computer, with a Windows XP

operating system with 80GB of hard disk drive. It has an Intel core i7 2.2 GHz processor.

There is 73GB of hard drive space left and 4000MB of RAM memory. Miss Lally hasMicrosoft Office software on her computer (Microsoft Word, Publisher, Excel, Access,

PhotoDraw)Miss Lally has broadband access to the internet Miss Lally has a monitor,

keyboard and a wireless mouse on which she could potentially use the system. Miss Lally

also has a CD and DVD writer, and a floppy disk drive, which could be useful to back the

system up on. They have a fast, high-quality HP laser printer, which would be useful at

printing customer and carer booking sheets at high speeds. My home computer is a Dell

computer, with an Intel Pentium 4 processor. There is 97.96GB of free hard drive space left,

and IGB of RAM memory. From this I can deduce that Miss Lally has the right hardware

requirements in order to carry out tasks on this database as the minimum hardware

requirements are as follows:

PrinterClearly a printer would be needed to check if the database can print out

specific data entry forms. Router would again also be needed as the database would be connected to a network

where Miss Lally can then work at home.

MonitorThe monitor will be needed to view all the work.

KeyboardThe keyboard will be needed to input data into the database.

MouseNavigate around the database.

Hardware component Minimum Recommended

Processor Pentium 4, 2.8 GHz Dual-Core 64-bit, 2

GHz

RAM 6 GB 8GB

Hard disk space 80 GB 150 GB

Computer

Other user requirements.


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When looking at these hardware components I can see that not all of Lallys computer

hardware meets the minimum requirements for a computer database. There are failures in the

hard disk space which in my opinion is crucial for the business. As stated in the problem we

can see that the business is increasing their customer base and therefore would need a large

hard disk space in order to cover this ever increasing customer base. Another failingcomponent is the Ram, Lallys being 4GB and minimum being 6GB. I believe that Ram is not

as important and therefore may not need to be upgraded, the Ram increases the speed at

which the computer runs at, and how fast different applications run at. Since this is a small

business and arent expected man calls at one single time the amount of RAM that is present

doesnt need to be increased. The processor that is present is the minimum amount required

for a smooth running database.

Entity Diagram

Child Carers Table

One-to-Many

(N-M)

Bookings Table1


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Child_carers

Carer_ID

Title

Forename

Surname

Address_line_1Address_line_2

Address_line_3

Town

County

Post_code

Telephone_Number

Mobile_Number

Date_of_birth

Gender

National_insurance_num

ber

Date_hired

Notes

Holidays

Holiday_ID

Carer_ID

From_date

To_date

Carer_working_holidays

Carer_ID

Day

From

To

Payments

Payment_ID

Booking_ID

Card_type

Card_number

Expiry_Date

Start_date

Issure_number

Alternative Payment

Total Cost

Bookings

Booking_ID

Carer_ID

Customer_ID

Price_ID

Booking_dateStart_Time

End_TIme

CustomersCustomer_ID

Title

Forename

Surename

Address_line_1

Address_line_2

Address_line_3

Town

County

Post-CodeEmail_address

Telephone_number

Mobile_number

Relationship_to_child

Prices

Price_ID

Day_of_the_week

Time_of_the_dayOther

Price_per_hour

Children

Child_IDCard_type

Card_number

Expiry_date

Customer_ID

Alternative_payment

Total_Cost

1

1

1

1

1

1

1

1


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2. Design

2.1 Data Dictionary

I will now show all the tables which are used in the Kidzcare Babysitting System, and include the fieldnames, data types and validation/input masks used in each table.

2.1.1 Customers Table

Table Name: Customers

Field Name Data Type Primary/

Foreign Keys

Validation/Lookups

Customer_ID AutoNumber Primary

Title Text Lookup: Mr, Mrs, Miss, Ms, Dr

Forename Text

Surname Text

Address_Line_1 Text

Address_Line_2 Text

Address_Line_3 Text

Town Text

County Text

Postcode Text

Email_Address Text

Telephone_Number Number

Mobile_Number Number

Relationship_to_child TextLookup: Mother, Father, Grandmother,

Grandfather, Aunt, Uncle, Legal Guardian


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2.1.2 Childrens Table

Table Name: Children


Foreign Keys

Validation/Input Masks

Child_ID AutoNumber Primary

Forename Text

Surname Text

Date_of_Birth Date/Time

Gender Text

Lookup Tables: Male, Female

Validation: Must be either Male or

Female

Customer_ID NumberForeign to

Customers

Special_Requirements Text

Additional_Information Text


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2.1.3 Child_Carers Table

Table Name: Child Carers


Foreign Keys


Carer_ID AutoNumber Primary

Title Text Lookup: Mr, Mrs, Miss, Ms, Dr

Forename Text

Surname Text

Address_Line_1 Text

Address_Line_2 Text

Address_Line_3 Text

Town Text

County Text

Postcode Text

Telephone_Number Number

Mobile_Number Number

Date_of_Birth Date/Time

Gender Text

Lookup Tables: Male, Female

Validation: Must be either Male or

Female

National_Insurance_Nu

mberText

Date_Hired Date/Time

Notes Memo


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2.1.4 Carer Working Hours Table

Table Name: Carer Working Hours


Foreign Keys


Carer_Working_ID AutoNumber Primary

Carer_ID NumberForeign to

Child_Carers

Day Text

From Date/Time

To Date/Time

2.1.5 Holidays Table

Table Name: Holidays


Foreign Keys


Holiday_ID AutoNumber Primary


Child_Carers

From_Date Date/Time

Validation: > Now ()

Ensures the date is greater than the

current time so carers dont book

holidays in the past.

To_Date Date/Time






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2.1.6 Bookings Table

Table Name: Bookings


Foreign Keys


Booking_ID AutoNumber Primary


Child_Carers

Customers_ID NumberForeign to

Customers

Price_ID Number

Foreign to

Prices

Booking_Date Date/Time





Start_Time Date/Time

End_Time Date/Time


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2.1.7 Payments Table

Table Name: Payments


Foreign Keys


Payment_ID AutoNumber Primary

Booking_ID NumberForeign to

Bookings

Card_Type Text

Card_Number Text

Expiry_Date Date/Time

Start_Date Date/Time

Issue_Number N umber

Alternative_Payment_

MethodText

Total_Cost Currency

2.1.8 Prices Table

Table Name: Prices


Foreign Keys


Price_ID AutoNumber Primary

Day_of_the_week Text

Lookup: Monday, Tuesday, Wednesday,

Thursday, Friday, Saturday, Sunday, N/A

Time_of_the_Day Text

Other Text

Price_per_day Currency


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2.2 Normalisation Tables

Child_Carers (Carer ID, Title, Forename, Surname, Address_Line_1, Address_Line_2, Address_Line_3, Town, County, Post_Cost,

Telephone_Number, Mobile_Number, Date_of_Birth, Gender, National_Insurance_Number, Date_Hired)

Prices (Prices_ID, Day_of_the_week, Time_of_the_day, Other, Price_per_hour)

Carer_working_Hours (Carer_ID, Day, From, To)

Holidays (Holiday_ID, Carer_ID, From_date, To_date)

Bookings (Booking_ID, Carer_ID, Customer ID, Price_ID, Booking_Date, Start_Time, End_Time)

Customers (Customer ID, Title, Forename, Surname, Address_Line_1, Address_Line_2, Address_Line_3, Town, County, Postcode_Code,Email_Address, Telephone_number, Mobile_number, Relationship_to_child)

Payments (Payment_ID, Booking_ID, Card_type, Card_number, Expiry_date, Start_date, Issue_number, Alternative_payment, Total_cost)

Children (Child_ID, Forename, Surname, Date_of_birth, Gender, Customer ID, Special requirements, Additional_information)

Key

Primary Key: Underlined

Foreign Key: Bold


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Key

Primary Key: Underlined

Foreign Key: Bold


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2.3 Design of Validation techniques

There will be validation on every form in the system, and including in a number of tables. Validation is

important in any system as incorrect data is no use to anyone. Increasing the amount of validation will

decrease the chances of incorrect data in the system due to human errors. There will also be validation

on text boxes in forms to ensure that the compulsory fields have all been filled out. I will add validation

to tables in the Booking and payments section; I will make sure that the user can only input 3 digits in

the Issue Number. If they do not follow the rule a message box will appear to inform the user the error.

Another technique that I have used is Validation for

2.3.1 Validation techniques

Input field Type Method of

Validation

Validation rule Validation text

Childrens

table

(Forename)

Number Data type

check

[Forename] Is Null Or Not Like

"*[!a-z]*"

-

Allow Letters only, and not

numbers.

Must enter Alpha

Characters only!

Customers

Table (Email

Address)

Text Format

Check

Is Null OR ((Like "*?@?*.?*") AND

(Not Like "*[ ,;]*"))Enter a Valid Email

Address!

Telephone

Number

Numeric Data Type

Check

Only numeric characters are

allowed in this field

You may only enter

Numeric values into

this field, please try

again.


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2.4 Design of security/password protection technique

Flowchart Key

The system

database isopened

Terminator

(start or End)

Decision

Input or

Output

Process

(performed by

com uter

User enters the

password when

prompted by the

security system

Computer database

checks to see whether

the password is correct

Is the passwordthe user has

entered correct

and match

No

End

Yes

Start Open

up the Access

Document


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2.5 Design of on screen data

2.5.1 Entry forms

The Customers Form holds the details of a customer, the form contains information about the customer,

it allows existing customer records to be retrieved by selecting the customer from the Find Customer

combo box as well as adding new customer records.

Find existing Customers using this

combo box.

Data entry fields that needs to have a

valued entered for new customers or

updating existing customers.

Control buttons on the form, allows the user to

add new customer records and to navigate to

others Forms and Reports.


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2.5.2 Form with sub form Carers Form

The Carers Form holds the details of the Carer, the form contains a sub-form that has the details of the

working hours for each carer. The Sub-form will select all the records for the selected carer.

Find Carer combo box to

lookup existing carers.

Sub-form contains all

the records from the

Carer working Hours

table for the givenCarer.

The Main form displays the Carers

Details.


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2.5.3 Design of user-friendly, menu driven, front end interface.

The Main Menu will be created using Accesss switchboard add-in. It will appear when the database is

first opened after the splash screen has been closed. Below is a diagram showing the menu which will

appear immediately after the splash screen.

17:30:00

Customers

Children

Child Carers

Bookings

Reports

About

Exit System

Kidzcare Babysitting Service

Various Option

buttons allow users tonavigate there way

throu h the s stem Labels for option

buttons inform users

what each option

button does

Clock added at the

bottom of the

switchboard

Main Switchboard

Opens the

FrmCustomers form

The Kidzcare

Babysitting logo

will go here

Opens the

FrmChildren form

Opens the Carers

Switchboard

Opens the

FrmBookings form

Opens the

FrmExitSystem form

Opens theReports

Switchboard

Runs the

about macro


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This is the Carers Switchboard which is accessed by clicking on the child carers button in the Main

Switchboard.

17:30:00

Child Carers

Holidays

Back


Takes you back to theMain Switchboard

Carers

Opens the FrmHolidays

Form

Opens the

FrmChildCarers form


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This is the Reports Switchboard which is accessed by clicking on the Reports button in the Main

Switchboard.

17:30:00

Bookings Report

Customer Report

Back


Opens the

CarersRep

Re orts

Opens the

CustomersRep

Report

Opens the

BookingsRep

Report

Carer Report

Take the user

back to the MainSwitchboard


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2.6 Design of Queries

There are many different types of queries which I could incorporate into the final system, for example a select query, a parameter query, a crosstab query, or

an action query. Queries are used to perform searches on sets of data in tables. In the Kidzcare Babysitting system most of the queries will use parameters

from the form that runs the query to fetch a single or multiple records from the database. In most cases these fields are customer ID, Carer ID or Booking ID. I

will be using a parameter query when creating reports for Miss Lally, as she will be able to choose which customer, carer, or booking she wants to base the

report on. I will use command buttons to run the reports based on information in a particular user form.

Types of

Query

Query Name Table Field Attribute Criteria Purpose Reason

Single Table

Query

Customers List Customers Customer_ID

Title

Forename

Surname

None Provide a list of Customer Names

allowing the user to select one from

a combo box in the Customers Form.

Single Table

Parameter

Query

ChildrenQry Children Forename

Surname

Gender

Date_of_birth

Special_requirements

Additional_information

Customer_ID Details of all the Children for a given

customer for the Childrens Form

Multi Table

Parameter

Query

CustomerRepQry Customer

Children

Customers.Title

Customers.Forename

Customers.Surname

Customer.Name

Customers.Address_line_1



Customers.Town

Customer_ID Details of A Customer and all the

children for the Customers Report

given a Customer_ID.


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Customers.County

Customers.Post_code

Customers.Email_address

Customers.Telephone_number

Customers.Mobile_number

Customers.Relationship_to_child

Children.Forename

Children.Surname

Children.Date_of_birth

Children.Gender

Children.Special_requirements

Multi Table

Parameter

Query

CustomerQry Customers

Child_Cares

Bookings

Payments

Customers.Forename

Customers.Surname

Child_Carers.Forename

Child_Carers.Surname

Bookings.Booking_Date

Payments.Total_Cost

Customer_ID Display Details of all the booking

for s given Customer.

Multi Table

Parameter

Query

CarersQry Customers

Child_Cares

Bookings

Payments

Customers.Forename

Customers.Surname

Child_Carers.Forename

Child_Carers.Surname

Bookings.Booking_Date

Payments.Total_Cost

Carer_ID Display Details of all the booking

for s given Child Carer


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Single Table

Parameter

Delete

Query

DeleteChildrenQry Children Not applicable as the entire

record is deleted so it affects ll

the columns.

Customer_ID In the Childrens Form when the

user click the Delete Children

Button it runs DeleteChildrenQry,

this will delete all the childrens

records for a given Customer_ID.


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2.7 Design of report

Customers Report Company Logo

Customers Details

Telephone No.

Name

Mobile No.

Relationship

Address

Town

County

Email

Postcode

Child

Name

Date of

Birth

Additional

Information

Special

Requirements

Gender

Todays Date Page number


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2.8 Design of Automated Routines

2.8.1 Routine 1 Calculate the Age of ta child

This calculation will be used on the Childrens form to determine the age of the child, to ensure that the

childs age is less than 18 years old, so that hes not actually an adult. If the age is greater than 18 yearthen an Error message is displayed otherwise the record will be saved.

Pseudo Code

Calculate Childs Age by finding the difference between the Date of Birth and the System Date to

determine this we will need to use a system function

If Childs Age > 18

Then

Display message Either the Date of Birth is incorrect or this is not a Child, please

change the Date of BirthElse

Add the record to the database.

End if


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2.8.2 Routine 2 Calculate the Cost

This will be called from the Booking Form when the user clicks on the CalculateCost button, the

routine will check that the user has entered value for three key fields:

1. Booking Date2. Start Time

3. End Time

If any of these fields does not have a value entered for it the routine will display an error message,

Must enter Date, Start Time and End Time before the Total Cost can be calculated.

Pseudo Code

If Booking Date is NULL or Start Time is NULL or End Time is NULL

Then

Display message Must enter Date, Start Time and End Time before the Total Cost can be

calculated.

Else

Calculate Hours from Start Time and End Time

Total Cost = Hours * Cost Per Hour

End if


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2.8.3 Routine 3 Ensure Keys fields have values entered.

This routine will be called from the Childrens Form when the user clicks on the Save and Exit button,

the routine will check that the user has entered value for key fields below:

1. Forename

2. Surname

3. Date of Birth

4. Gender

5. Customer ID

Pseudo Code

If Forename is NULL

Then

Display message Must enter Forename before saving this record

ElseIf Surname is NULL

Then

Display message Must enter Surname before saving this record

If Date of Birth is NULL

Then

Display message Must enter Date of Birth before saving this record

Else

IfGender is NULL

Then

Display message Must enter Gender before saving this record

ElseIf Customer ID is NULL

Then

Display message Must Select a Customer before saving

this record

Else

Save the Record and Close form

End if

End if

End if

End if

End if


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3 Implementation

3.1 Evidence of Relational Links diagram


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3.2 Create tables and links

3.2.1 Child Carers Table


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3.2.2 Customers Table


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3.2.3 Payments table


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3.2.4 Childrens table


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3.3 Two data validation techniques

3.3.1 Validation technique 1

Firstly I opened up the

database in design view

and then selected the

childrens table. I wanted

to validate the Forename

field and opened up the

properties in this field and

then the data tab.

I then decided that I wantedto use the validation of data

type check, meaning that I

didnt want to allow the

user to enter Numbers in an

alpha text only field. As you

can see the Validation Rule

was =*Forename+ Is Null Or

Not Like "*[!a-z]*", and if

the user was to enter this

wrong then the validation

text would appear stating

Must enter Alpha

characters only!


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Any character outside the range A to Z is rejected, see error message below:

As you can see the text in the

Forename field is Numeric

and therefore the error

message has appeared.


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3.3.2 Validation technique 2

Open the Customers

form in design view

and click on emailAddress field and

view the properties

The Validation rule that has been used is Is Null OR ((Like "?@?.?") AND

(Not Like "* ,;+")) this means Requires at least one character, @, at least one character,

dot, at least one character. Space, comma, and semicolon are not permitted. Thevalidation message was Enter a valid Email address


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When en invalid email address is entered error message is display, shown below;

As we can see the validation technique works, User entered wrong data and now they have been

prompted with the Error Validation Message.


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3.4 Automated Routines

3.4.1 Childs Age Calculation

This calculation will be used on the Childrens form to determine the age of the child, to ensure that

the childs age is less than 18 years old, so that hes not actually an adult. If the age is greater than

18 year then an Error message is displayed otherwise the record will be saved. Open up the

Childrens form in design view, click on the Add Child button, this will bring up the properties sheet,

shown below

Choose Builder popup will appear, shown below:

Click on the Event

tab and click on

the Event

Procedure

Click on Code Builder


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This will open up the Microsoft Visual Basic window and which will have the following contents:

Enter the code shown below in red:

Private Sub Add_Child_Click()

On Error GoTo Err_Add_Child_Click

Exit_Add_Child_Click:

Exit Sub



Dim varAge As Variant

Dim childs_age As Integer

If IsNull(Forms!Children!Date_of_Birth) Then Age = 0: Exit Sub

varAge = DateDiff("yyyy", Forms!Children!Date_of_Birth, Now)

If Date < DateSerial(Year(Now), Month(Forms!Children!Date_of_Birth), _

Day(Forms!Children!Date_of_Birth)) Then

varAge = varAge - 1

End If

childs_age = CInt(varAge)

If childs_age >= 18 Then

MsgBox "Either the Date of Birth is incorrect or this is not a Child, please

change the Date of Birth, age is " & childs_age

Exit Sub

Else

DoCmd.GoToRecord , , acNewRec

End If


Exit Sub

Err_Add_Child_Click:

Check for Null Date of Birth value

The DateDiff compares the two

dates that are passed as parameters

and returns the difference; in this

case in years as the first parameter

is set to yyyy, this result will be

the age of the person.

The calculated age is tested to ensure that it is

not greater than or equal to 18, if it is an

appropriate message is displayed otherwise the

record is saved.


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3.4.2 Calculate Total cost of Booking

This routine will be called from the Booking Form when the user clicks on the Calculate Cost

button, the routine will check that the user has entered value for three key fields:

1. Booking Date2. Start Time3. End Time

If any of these fields does not have a value entered for it the routine will display an error message,

Must enter Date, Start Time and End Time before the Total Cost can be calculated.

To create this routine select the Booking Form in design view, select the Calculate Button on the

form and display the Properties sheet and select the Event tab, then click on Event Procedure as

shown below:

Calculate Button and the key fields

Click on

the

Event

Trigger


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Enter the code as shown in the window below, this code will only calculate the host of a booking if

all the fields above have been populated

Private Sub cmdcalculateCost_Click()

If IsNull(Forms!Bookings!txtStartTime) Or IsNull(Forms!Bookings!txtEndTime) Or

IsNull(Forms!Bookings!txtDate) Then

MsgBox "Must enter Date, Start and End Times before Calculating the Total Cost"

Exit Sub

End If

Forms!Bookings!txttotalcost = Forms!Bookings!txthourlyrate*Forms!Bookings!txttotalhours)+5

End Sub

This checks to make sure that the key fields are

populated before we attempt to calculate the

total cost of the booking. If any are NULL them

a message box is displayed with an appropriate

messa e

Calculates the cost of the Booking,

which is achieved by multiplying the

number of hours by the hourly rate

plus 5 for admin fee.


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3.4.3 Ensure that Key fields are Populated

This routine will be called from the Childrens Form when the user clicks on the Save and Exit

button, the routine will check that the user has entered value for key fields below:

1. Forename

2. Surname

3. Date of Birth

4. Gender5. Customer ID

To add this code to the routine Open the Childrens Form in Design view, select the Save and Exit

button and view the properties sheet, select the Event tab and click on the Event Procedure as

shown below:

Click on the

Event

Trigger

Select the Add Child

button


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Then enter the following code in the Visual Basic window:

The code checks the fields and if any are found to be NULL (i.e. empty) is displays a message box

with an appropriate message otherwise the record is saved and the form closed.

Private Sub Command18_Click()

'Save and exit

On Error GoTo Err_Command18_Click

If Forms!Children!Forename = "" Then

MsgBox "Must enter Forename before saving this record."'Exit Sub

Else

If Forms!Children!Surname = "" Then

MsgBox "Must enter Surname before saving this record."

'Exit Sub

Else

If IsNull(Forms!Children!Date_of_Birth) Then

MsgBox "Must enter Date of Birth before saving this record."

'Exit Sub

Else

If IsNull(Forms!Children!Gender) Then

MsgBox "Must select Gender before saving this record."

'saveFlag = FalseElse

If IsNull(Forms!Children!Customer_ID) Then

MsgBox "Must select Customer before saving this record."

'Exit Sub

Else

DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70

DoCmd.Close

End If

End If

End If

End If

End If

Exit_Command18_Click:

Exit Sub

Err_Command18_Click:

MsgBox Err.Description

Resume Exit_Command18_Click

End Sub


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3.1 Forms Implementation

3.1.1 Customers Form

Clicked on Create Form Wizard and selected the Customers table forms, and selected all the filedin this table as shown below, and clicked Next> button.

The window is displayed, and clicked Next> button:


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On the next screen selected None for Style and the following window is displayed:

Selected the Modify option and clicked the Finish button.

I moved the fields to the desired positions and changed the font colour of all the boxes to blue by

highlighting all the labels and clicking the right button on the mouse, and finally selecting the blue

font/fore colour from the list. I changed the background colour of the form in the same way by right

clicking on the background and clicking on the light blue colour from the fill back colour option.


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I moved the form header section down and changed the background colour in the same way by right

clicking on the form, clicking on fill back colour and finally selecting the purple colour from the

palette.


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I created a Kidzcare Logo in a word application and copied and pasted it into the header. I moved the

logo until I was happy with the position.


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Next it was time to create the combo box to allow the user to select a particular customer. I clicked

on the combo box icon from the toolbar on the left, and dragged out the combo box onto the form.

In the combo box wizard box, I selected the last option, Find a record on my form based on the value

I selected in my combo box, and I click on next.

Next I selected the Customer_ID, Forename and surname fields and moved them into the selected

fields list by clicking on the first single arrow. I chose these fields as the user needs to choose from a

customers name in the combo box in order to edit any details. Finally I clicked on next.


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Finally I saved the combo box as CmbFindCustomer and clicked on the Finish button

Right click on the find customer combo box and click on properties. Change the caption to Find

Customer, and change the font weight to bold. Change the font colour to blue.


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Next I created the command buttons of the forms. I click on the command button icon from the

toolbar and in the command button wizard I click on record operations, and on add new record.

Finally I clicked on the next button.

In the next step of the wizard I entered Add New Customer in the text section and clicked Next.


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on

Right clicked on

the command

button and

clicked on

properties. I

changed the font

weight to bold. I

right clicked on

the button again

and in the

font/fore color Iclicked on blue.

I saved the

CmdNewCustomer

and clicked on Finish


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3.1.2 Childrens Form

I clicked on Create tab Forms Wizard and selected the Childrens table on the Window below:

As in the Customers form clicked on Next> and selected the same options and clicked on Finish on

the window below:


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I then arranged the fields to fit the form better and changed the font colour of all the boxes to

purple by highlighting all the labels and clicking the right button on the mouse, and finally selecting

the purple font/fore colour from the list. I right clicked again and changed the back colour to light

purple. I added a shadow to each label by right clicking on them and clicking on properties. I changed

the special effect to shadow to and the border style to solid to give them a border. I didnt want the

users to see the child_ID so I set the visable propery in the format tab to No.


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I clicked on the label and located it where I wanted on the form. I right clicked on the label and

clicked on caption, changing it to children. I Changes the font size to 18, the font colour to purple

and the wont weight to bold.

I click on the command button icon and in the command button wizard I click on record operations,

and Add New Record to allow the user to add a new child record in the form. When I had selected

the correct actions and categories I clicked on Next.


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In the next step of the wizard I clicked on text ad entered Add Child. Finally I clicked on the Next

button to continue.

In the next step I entered the name of the command button and clicked on Finish.


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I right clicked on the command button and changed the fore colour to purple, and the font weight to

bold.

I created another command

button and removed the

wizard option by clicking on

the icon from the toolbar.


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I wanted to allow the user to save andexit the form at the click of a button, and in order to allow the

user to do this in one button I had to create simple coding In Visual Basic. The circled area is where I

added the VBA coding. Once I had written the coding I saved and closed the program.


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I went into the format

tab in the properties

box, and changed the

caption to save and exit.

I changed the fore/font

colour to purple and the

font weight to bold.

I clicked on the square icon from the toolbar on the left hand side, and arranged it around the

command buttons. I change the colour to purple and the border width to 1 pt, finally save the form.


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3.1.3 Carers Form with a Sub-form

This form is for entering the carers details as well as the details of the working hours. As a carer can

work many days of the week the, Carer_Working_Hours table will have many records for a single

Carer record, one to many relationship, therefore the Carers details will be in the Main form and the

working details will be in the sub-form. So first we create a Sub-form Carers Working Hours based

on the Carers_Working_Hours table, in a similar way as the Customers and Childrens forms. I

then created the Carers form based on the Carers table, to create the Sub-form I dragged-and-

dropped the Carers Working Hours form onto the Carers Form and moved the fields on the two

forms as shown below:

Carers

WorkingHours

sub-form

Main Form Details


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3.2.2 Splash Macro

Purpose: - This macro is called by the Splash form. The macro closes the Splash form and opens the

Switchboard form. This macro is created the same way as the About marco , but instead of a

MsgBox action we choose Close and OpenForm Actions and completed as shown in the steps below:

Step 1 - close the Splash form:

Step 2 Opens the Switchboard form:

The Splash macro is called by the Splash Form, this form has a timer based event that calls the Splash

macro, and this event is triggered 4000 micro-seconds i.e. 4 seconds after the Slash Form has been

running. The macro will close the Splash form and start-up the Switchboard form. The screenshot

below shows how the Splash macro is setup with the Splash Form;

Action is to close a Form

Object type to be closed is a

Form to close is the Splash form

Action is to Open a Form

Object type to be open is a

Form

Form to Open is the Main


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Results


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3.3.2 Single Table Parameter Query - ChildrenQry

This query selects all the records from the Childrens Table returning all the fields for a given

Customer_ID. The Customer_ID will be used from the Customers Form.

Results - given Customer_ID = 4 returns the following results:

Search Criteria using the Customer_ID from the

Customer form.

Only returns the Childrens records

where Customer_ID = 4


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Results of this query run when the Customer_ID = 4.

The screenshot below show the other fields that are not visible above;

Data columns retrieved from the Customers Table

Data columns retrieved from the Customers Table Data columns retrieved from the Childrens Table


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3.3.4 Multi Table Parameter Query - CustomerQry

This query selects details of all the bookings that a given Customer has made previously, the data is

selected from four tables, Customer, Bookings, Payments and Child_Carers. The Customer_ID is

provided from the Customers Form

Results: For Customer_ID = 4

Multi table query between Customers, Bookings,

Child Carers and Pa ments ke s used to oin the tables.

This shows all the booking for Customer_ID = 4


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3.3.5 Multi Table Parameter Query - CarerQry

This query selects details of all the bookings that a given Carer has attended previously, the data

is selected from four tables, Customer, Bookings, Payments and Child_Cares. The Carer_ID is

provided from the Child_Carers Form.

Results All the booking for Carer_ID equal to 3.

Multi table query between Customers, Bookings,Child_Carers and Payments, keys used to join the tables.

This shows all the booking for Carer_ID = 3


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3.3.6 Single Table Parameter Delete Query DeleteChildrenQry

This query deletes all the Children records for a given Customer_ID, this query will be run from the

Childrens Form.

The criteria used to delete records for a given

Customer, taken from the Customers Form

Delete Query Type Delete records from the Childrens table.


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3.4 Creating Customers Report

To create the Customers Report first create a query as described in the previous section joining

Customers and the Childrens table, then open the Reports Wizard, as shown below

Select the query created for this report, CustomerRepQry, move all the require columns to theSelect fields section, moving them left to right:

Click the Next> button and the following screen will appear, leave the default selection, byCustomers as shown below and click Next > button:


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Below is a report for a customer, show the Customer and Childrens details separated.


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Individual programming code.

Automated routine code 1

Enter the code shown below in red:



Dim childs_age As Integer

childs_age = DateDiff("yyyy", Forms!Children!Date_of_Birth, Now())

If childs_age >= 18 Then

MsgBox "Either the Date of Birth is incorrect or this is not a Child, please

change the Date of Birth, age is " & childs_age

Exit Sub

Else

DoCmd.GoToRecord , , acNewRec

End If


Exit Sub

Err_Add_Child_Click:

MsgBox Err.Description

Resume Exit_Add_Child_Click

End Sub

Function call to get the age in years

The calculated age is tested to ensure that it is

not greater than or equal to 18, if it is an

appropriate message is displayed otherwise the

record is saved.


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4 Testing

4.1 Test Plan

Test No. Test Type Criteria Expected Outcome Actual Outcome Evidence

1 User Interface and test all

routes through the system

Buttons take to

relevant forms, and

allows user to exit

application.

User able to

navigate the systems

using different form

and Reports.

As Expected Teacher must sign Here

if test is successful

2 Data entry with Valid Data Add Customer using

the Customers Form

Customer record

added to the

Customers Table.

New customer

record added to

the Customer

table.

See test for results.

3 Data entry with extremes

of Data

Add extreme valid data

to the entry fields and

this data must be

accepted without an

error message.

The extreme data is

added without an

error message

appearing

As expected, no

error message with

the extremes of

data.

See test for results.

4 Calculation Test To test this procedure

enter Childrens form, set

the date of birth to 26-

Sep-60

Message Box is

displayed with

appropriate

message highlighting

A message box is

displayed with

indicating error in

Date of Birth

See tests documentation


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fields. When all the

fields are entered the

cost is calculated

correctly

that needs to be

entered. When valid

data is entered teh

cost of booking is

displayed correctly.

10 Automated Procedure 2

Calculation

Check that the a child

with the age over 18

cannot be entered

A message with the

age is displayed to

the user.

As expected See Tests.

11 Automated Procedure 3 Ensure that error

message with details of

the missing fields is

displayed if a user

attempts to save

without entering all the

key information.

An appropriate

message is displayed

highlighting the field

that needs to be

entered., otherwise

the record is

updated and the

form closed.

As expected See Tests.


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4.2 User Interface and test all routes through the system

Main Menu

Switchboard

Customers

Add Edit Delete Search

View Report

Children

Add Edit Delete

Bookings

Add Edit View Report

Child Carers

Add Edit Delete Search

View Report


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This is the

field after

the data has

been saved.


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Data Entry with extremes of Data

This is a print screen of the table before the new entry has be saved.

The data is entered into the entry

form.


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For this test I tested a a child who was 17 years and 364 days old as an extreme of data, this was

tested along with the days date.

If the child was 18 on the 02/05/2012 , then they should be allowed to be entered on the system.

As we can see the extreme of data

has been accepted without any

error messages.


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4.3.2 Check for a valid Email Address

As the user has

entered the email

address in

properly they are

allowed to

continue onto the

next field filling

out the rest of

the form.

As we can see here the

user has clearly entered

invalid data as all email

addresses need an @ sign

and therefore the error

message has appeared.


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4.4 Testing Automated Routines

4.4.1 Age Calculation Testing

Purpose: - Test procedure that calculates the Age of a child

To test this procedure entered data for the fields on the Childrens form, set the date of birth to

26-Sep-60 on the Childrens form shown below:

This will cause the following message box to be displayed:

Enter details

of the of the

child and set

the date to

20-Sep-60,

once the

required

information

has been

filled click on

Add Child

button


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The screen shot below shows these two records in the Customers and Childrens tables:

The main Customers record For Mr

James Gill, CUSTOMER_ID = 9

The Jessicas record in the Childrens table

which points to the master record, foreign key,

CUSTOMER_ID = 9, linking the two records

together


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4.7 Database Queries Testing

4.7.1 Single Table Query CustomerListQry

Purpose: - This query selects all the records from the Customers Table returning the Name of the

customer and the Customer_ID. The Name of the Customer is a concatenation list of the Title, Forename

and Surname with a space between each field.

The Name is constructed from the Title, Forename

and Surname with a space between each field.

Order the records ascending using

this column.

Note: There are no criteria defined for this query so it

returns all the records from the customers table.


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Test Results: - Pass, as it retrieves the Customer_ID and the Name for all the records in the

Customers Table.


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4.7.3 Testing Multi Table Parameter Query - ChildrenRepQry

Purpose: - This query selects all the records from the Customers and the Childrens Table

returning all the fields for a given Customer_ID. The Customer_ID will be used from the

Customers Form.

The screen shot below shows the criteria column used to select the particular Customer record that

weve interested in:

To test just the query in isolation the window below prompts for the desired Customer_ID:

Test Results: - Pass, given Customer_ID = 4, the query returns the only record for Serena Bains

Search Criteria using the Customer_ID from the

Customer form.

Multi table query between Customers and

Children, the key used to join the two tables is

Customer_ID


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Test Results: - Pass, given Customer_ID = 4 it shows all four bookings made for the customer:

This shows all the booking for Customer_ID = 4

Customer Forename and Surname from

the Customer Table

Child Carers Forename and Surname from

the Child_Carers Table

Booking Date from the Bookings Table

Cost of the Booking from the Payments

Table


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To test just the query in isolation the window below prompts for the desired Customer_ID entered

value 110:

Test Results: - Pass the two records with Customer_ID = 110 for First Piggy and Second Piggy

have been deleted, records that remain in the table shown below:


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As the system is opened you are prompted to enter a password.

The user must enter a

password and only then

can they progress onto

the main database.


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Test with incorrect password

If the User was to enter

in the wrong password

then they would be

prompted with a

message, Not a valid

Password, and then

would have to enter a

right password.


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Test Number 11 - Test calculation is correct

This is part of the Booking forms and calculates the cost for the customer.

I clicked on the calculate costs button and the hourly rate, total hours and cost text boxes were

filled with the correct values. Therefore the test was a success.


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5.2 Details of how to enter passwords or other security

procedures

When the system is opened you will be prompted for a username and password. Use your user

name and password to access the system (see appendix for details on user names and passwordsalready created). Warning: You will not be able to access the system without your password.

To change existing user names and passwords or add additional usernames and passwords you must

have admin access to the system or your access will be denied and you will not be able to make any

changes to the security settings.

5.2.1 Changing usernames and passwords:

1. Open the system from the Kidzcare Babysitting Service folder created in the installation

procedure, and log in using administrative access. Please note you will be able to amend

existing user names and passwords, or add additional ones without the administrative user

name and password.

A rom t like the one above will a ear to allow the user to enter their user name and assword


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2. Once you gain access to the system click on Tools, Security and User and Group Accounts

3. In the User and Group Accounts box click on the user tab to add and remove users. In the

Available groups column select the group you wish to add or remove and click Add to add it

to the Members column, or remove to get rid of it.

4. To change a password of an existing user click on the change logon password tab and type in

your current password. In the text boxes below type in your new password. Please note to

change the password of your own account you do not require administrative access.


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5. To change the permissions of an individual users click on Tools, Security and User Group

Permissions. Again this can only be done using administrative access.


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6. To Change the permissions of a user, click on the Permissions tab and select the user/group name

whose permissions you wish to change. In the permissions box check or uncheck the permissions

you want to amend.


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The Main Switchboard shown below allows you to navigate your way around the system.

Opens the customers

Opens the Reports Switchboard

Opens the Child Cares

Switchboard

Shows a message box

about the system

Opens the Bookings form

Opens a form which allows

you to exit the system

Opens the children form

The Kidzcare Babysitting

Service logo

Shows the current

time (24 clock)


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In the customers

form the Past Bookings

button allows you to look

at all the bookings thatthe customer you have

selected has made. Of a

particular customer.

When you click on the Past Bookings button the form shown below will appear showing the

details of the past bookings of the customer you have selected in the customers form.

When you click on the Save and Exit button in the CustomerQry form the form will close andthe customers form will reopen.


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After you have selected a customer

from the customers form you can view

and print a report on the customers

details. To do this you click on the View

Report button from the customersform.

To print the customers reportsimply click on the print icon

from the toolbar

The report can also be accessed

from the reports switchboard or

the navigation toolbar


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5.3 Making a Booking

The Make booking button on the Customers form opens the bookings form shown below. Thebookings form can also be accessed from the navigation toolbar and the Main Switchboard.

Once the form is opened first select the customer from the customer details section. (Youmust complete the sections in order or error messages will appear telling you to go back to a

missed section.

Next enter the data and time you wish to book the customersbooking for. If there are no carers available for the date and

time you have picked, then an error message will appear telling

you that no carers are available as they are either fully booked

or on holiday.

If no message box appears then click on the Find carer box and

select any of the carers which are available to work. You will be able to choose any one from

the carers box as all the ones in here will be available for the day and time entered.

Click on the Calculate costs button to find the hourly rate, total hours, and cost of the booking Enter the payment details for the customer. You must enter their method of payment, for

example either enter their credit card details or enter an alternative method of payment.

The Make Booking button

confirms the booking with a

message box, and opens a

report based on the Booking

details

See next page to view an

example of a bookings report

The Exit button closes the form


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Below is a screenshot to show what a bookings report would look like

The report can also be accessed from the reports switchboard or the navigation toolbar

To print the report click on the print icon from the menu bar


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5.4 Adding and amending child carer details

When the form appears you can search for a carer from the combo box. Once you select a customer from

the combo box, their details are copied into the text boxes in the form. You may edit details by replacingthe current text boxes in the form.

The Past Bookings button on the Child Carers form opensanother form which shows their booking history according

to the date.

(See the Carer Bookings form below as an example)

To add a new carer simply click on the Add New Carer

button. T

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