Download - Context Diagram 1
-
7/31/2019 Context Diagram 1
1/10
CONTEXT DIAGRAM-An overview of anorganizational system that shows the system boundary,
external entities that interact with the system,& themajor information flows between the entities & the
system.
DATA FLOW DIAGRAMIt was proposed by De Marco(1978) and Gane and Sarson (1979)
One of the most important tools used by the system analyst
It is made up of number of symbols which represents systemcomponents
A picture of the movement of data between external entities &
the processes and data stores within the system
-
7/31/2019 Context Diagram 1
2/10
CONTEXT DIAGRAM AND DFD SYMBOLS
A PROCESS MEANS THAT
SOME ACTION OR GROUPOF ACTIONS TAKE PLACE
AN ENTITY IS A PERSON,GROUP, DEPARTMENT, ORANY SYSTEM THAT EITHER
RECEIVES OR ORIGINATESINFORMATION OR DATA
A DATA FLOW SHOWS THATINFORMATION IS BEING
PASSED FROM OR TO APROCESS
DATA STORE - DATA THAT AREAT REST IN THE SYSTEM;
DEPICTED USING AN OPEN-
ENDED RECTANGLE IN DATAFLOW DIAGRAMS
-
7/31/2019 Context Diagram 1
3/10
CONTEXT DIAGRAM
0
SYSTEM
NAME
ENTITY
1
ENTITY
3
ENTITY
2
INPUT A
INPUT B
INPUT C
-
7/31/2019 Context Diagram 1
4/10
CONTEXT DIAGRAM
ENTITY
2
ENTITY
1
ENTITY3
1
GENERAL
PROCES
AAA
2
GENERAL
PROCES
BBB
3
GENERAL
PROCES
CCC
4
GENERAL
PROCES
DDD
D1 DATA STORE D2 DATA STORE
RECORD A RECORD E
INPUT ADATAFLOWB
DATAFLOW C
OUTPUT C
RECORD A RECORD E
INPUT B DATAFLOW D
-
7/31/2019 Context Diagram 1
5/10
CONTEXT DIAGRAM
Spendingrequest
Rejectedrequest
Deliveryadvice
Budgetallocation
Requ
est
for specialapproval
Responseto specialapproval
Spendingsummaries
Part order
BUDGETMONITORING
SYSTEM
DEPARTMENTS
SUPPLIERS
MANAGEMENT
MANAGEMENT
Supplierdeliveryadvice
-
7/31/2019 Context Diagram 1
6/10
TOP-LEVEL DFD2
Set upbudget
DEPARTMENTSMANAGEMENT
SUPPLIERS
1
Checkfunding
3
Classifyexpenditure
5
Organizesupplies
4
Providespending
summaries
Budget allocation
Spending
summariesSpending
request
ALLOCATEDBUDGET
Rejected
request
SUSPENDEDREQUEST
Recorded
request
Approved
request
Delivery advice
Request for
special approval
Response tospecial approval
DEPARTMENTALACCOUNT
TYPEACCOUNTS
Part order
Supplier
delivery
advice
-
7/31/2019 Context Diagram 1
7/10
Expansion of classify expenditure process
TYPE ACCOUNTS
Approved
request
Classified request
Update request
Request total
Recorded request
3.1
Classifyexpense by type 3.2
Update typeaccount
3.3
Sum total
3.4
Updatedepartmental
record
Classified requestClassified requestClassified request
DEPARTMENTALACCOUNTS
-
7/31/2019 Context Diagram 1
8/10
CONTEXT DIAGRAMSUPPLIERS
ENGINEERING
PRODUCTION
SCHEDULERS
0
PURCHASING
FULFILLMENT
SYSTEM Supplier MaterialSpecifications
Shipment
Requestfor Quotes
Order
Price &
TermsQuotes
Supplier MaterialEvaluation
MaterialSpecifications
MaterialAvailability
Production
Capacities
ProductionSchedules
-
7/31/2019 Context Diagram 1
9/10
Data Flow DiagramSUPPLIERS
PRODUCTION
SCHEDULERS
ENGINEERING
SUPPLIERS
ForecastMaterialNeeds
1.0
PlanPurchaseAgreement
2.0
DevelopPurchased
GoodS ecs
3.0
SelectPreferredSupplier
4.0
OrderMaterials
6.0
Produce
Bill ofMaterials
5.0
MaterialForecast
SupplierMaterial
Evaluation
Material
Specifications
Criteria
ProductDesign
Bill ofMaterialsOrder
PreferredSupplier
Supplier
Description
Price &Term
Quotes
ProductionSchedules
ProductionCapacities
-
7/31/2019 Context Diagram 1
10/10
Purchasing Fulfillment SystemAnalysis Phase Project Review
A. Summary of Project Objectives
B. Progress to Date
1. Steps Performed
2. Project Schedule
C. Findings
1. Problems & Opportunities Identified2. Information Requirements
D. Alternatives
1. Comparison of Alternatives
2. Details on Recommended Alternatives3. Justification for Recommendation
4. Resource Requirements
E. Plan for Design Phase
Questions
Conclusions & Action Items