by ozlem albayrak ctis 494 quality assurance and reliability by dr. ozlem albayrak 2007 fall
TRANSCRIPT
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by Ozlem Albayrak
CTIS 494
Quality Assurance and Reliability
by
Dr. Ozlem Albayrak
2007 Fall
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by Ozlem Albayrak
Introduction to CTIS494
Course Elements:
- Students
- Instructor
- Course Material
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by Ozlem Albayrak
Instructor
Ozlem Albayrak– Computer Eng. Bilkent, 1992– M.B.A., Bilkent, 1994– M.S., UMCP, 1998– Phd., Ankara, 2002
Room# 212Phone: 290 5039E-mail: [email protected]
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by Ozlem Albayrak
The Students
? Attendance Get to Know Why are they here? Expectations, Interests
This is an ELECTIVE course, may require more...
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by Ozlem Albayrak
Office Hour
Tuesday: 14:40-15:30Thursday: 8:40-10:30
e-mail orappointment
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by Ozlem Albayrak
CTIS 494 Outline (1)
Week Subject
17.09 Introduction to Software Quality Assurance
24.09 Software Inspections and Testing
01.10 Capability Maturity Model
08.10 ISO9000 and SPICE (1 hour missing)
15.10 Software Quality Metrics
22.10 Seven Basic (B7) Tools of Quality
29.10 The Seven MP Tools
05.11 MIDTERM (30%)
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by Ozlem Albayrak
CTIS 494 Outline (2)
12.11 5S for Intelligent Housekeeping in Software Development
19.11 Software QFD and Voice of the Customer
26.11 Risk Assessment and Failure Modes and Effects Analysis
03.12 Quality Measures and Statistical Methods for Trustworthy Software
10.12 Verification and Validation (PROJECT REPORTs Submission 15%)
17.12 Testing and Evaluation (1 hour missing)
24.12 Integration, Extension and Maintenance for Trustworthiness (PROJECT PRESENTATIONs 20%)
31.12 Review (2 hours missing)
7.12 FINAL (35 %)
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by Ozlem Albayrak
Today ...
Week Subject
17.09 Introduction to Software Quality Assurance
24.09 Software Inspections and Testing
01.10 Capability Maturity Model
08.10 ISO9000 and SPICE (1 hour missing)
15.10 Software Quality Metrics
22.10 Seven Basic (B7) Tools of Quality
29.10 The Seven MP Tools
05.11 MIDTERM (30%)
Introduction to Software Quality Assurance
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by Ozlem Albayrak
Course Material
Not limited to: The main text book References All quality related high quality sources
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by Ozlem Albayrak
References (1)
“Quality Assurance for Information Systems” by W. E. Perry, QED Technical Publishing Group 1991.
“Statistical Quality Design and Control” by R. E. DeVor, T. Chang, J.W. Sutherland Macmilllan, 1992.
“Software Quality Assurance Reliability and Testing” Chris Summers 1987.
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by Ozlem Albayrak
References (2)
“Handbook of Software Quality Assurance”, G. G. Shulmeyer, CDP J. I. McManus 1987.
“Total Quality” J.W. Dean, Jr. J. R. Evans West 1994.
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by Ozlem Albayrak
Grading
1 Midterm 30% (II. Parts: Closed and Open book)
1 project 35% (Group of 4)
1 Final 35% (Open book)
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by Ozlem Albayrak
Course Goal:
Software Quality Assurance and ReliabilityThis course provides students with the
analytical and management tools necessary to solve software quality problems and implement effective quality systems.
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by Ozlem Albayrak
Topics include:
voice of the customer analysis, the Six Sigma problem solving methodology, process capability analysis, measurement system analysis, design of experiments, statistical process control, failure made and effects analysis, quality function development, and reliability.
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by Ozlem Albayrak
What is Quality?
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by Ozlem Albayrak
Concentration on:
SOFTWARE QUALITY ASSURANCE
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by Ozlem Albayrak
Requirements
Come to class prepared (search related subjects)
Involve in in-class-case studies or exercises Team work is important part of the course
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by Ozlem Albayrak
Project
Details are written in the handouts
You will evaluate your clasmates studies
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by Ozlem Albayrak
CTIS494 PROJECT DETAILS
35% of the total grade is from the projects (same weight as final)
The course project is a group project each of which will be developed by 4 students.
Project subjects will be announced by the instructor. Project requires groups to submit a report and deliver a in-class presentation. Reports will be submitted 2 weeks before the presentations.
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by Ozlem Albayrak
Project Report specifications
Project reports will be prepared as web pages that can be accessed by all the students and the istructor.
The groups are free to design their web pages format, but the generated pages should be readable and understandable.
Navigation among the pages should be carefully organized.
The quality of the web pages will be determined by is content, format as well as its timely distribution. Late submissions will be heavily penalized.
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by Ozlem Albayrak
Project Presentations
Project study will be presented in classroom. Following the presentations there will be a question-answer
session during which the instructor and the other students are allowed to ask questions.
Those students who prepare good questions will be awarded by the instructor.
Fluency of the presentation is as important as its content, thus the groups are urged to prepare their presentations in advance to deliver a high quality presentation.
Duration of the presentations will be announced by the instructor. Using time effectively is an important element.
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by Ozlem Albayrak
Project Evaluation
20% of the project grade is allocated for project presentation and 15% is for the project report.
15% includes evaluation of the following items:– Content– Format and ease and fluency of navigation– Timely delivery
20% includes evaluation of the following items:– Content– Fluency of the presentation– Obedience to time limits– Answers to questions
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by Ozlem Albayrak
Quality exercise
Define high quality toilette paper? Single (5 min) In groups of two (5 min) Reviews....... Hw # : form a group of four One address for the class and registration to
the group.... Do not wait for invitation register
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by Ozlem Albayrak
What is quality?
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by Ozlem Albayrak
Different Perspectives on Quality
Beauty is in the eye of the beholder For the same course one may say it is highly
theoretical, while others state that it is highly practical.
There are many different definitions and dimensions of Quality
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by Ozlem Albayrak
Quality Dimensions
Transcendent Product based User based Manufacturing based Value based
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by Ozlem Albayrak
Transcendent
Quality is something that is intiutively understood but nearly impossible to communicate, such as beauty and love.
I like it, because I just like it....!!!
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by Ozlem Albayrak
Product based
Quality is found in the components and attributes of a product.
I like it, because the product has ....
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by Ozlem Albayrak
User based
If the customer is satisfied, the product has good quality.
I am satisfied with this product.
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by Ozlem Albayrak
Manufacturing based
If the product conforms to design specifications, it has good quality.
The product is of xxx standards.
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by Ozlem Albayrak
Value based
If the product is perceived as providing good value for the price, it has good quality.
This is the best one I can buy at this price.
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by Ozlem Albayrak
Garvin’s 8 quality dimensions
Durability
Features
Performance
Reliability
Conformance
Serviceability
Aesthetics
Percieved quality
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by Ozlem Albayrak
Performance
Efficiency with which a product achieves its intended purpose
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by Ozlem Albayrak
Features
Attributes of a product that supplement the product basic performance
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by Ozlem Albayrak
Reliability
Propensity (eğilim) for a product to perform consistently over its useful design life
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by Ozlem Albayrak
Conformance
Is a particular dimension of a product is within the allowable range of tolerance of the specification, the product conforms.
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Durability
The degree to which a product tolerates stress or trauma without failing
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Serviceability
Ease of repair for a product
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by Ozlem Albayrak
Aesthetics
Subjective sensory characteristics such as taste, feel, sound, look and smell.
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by Ozlem Albayrak
Perceived Quality
As the customer perceives the quality.
QUALITY
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by Ozlem Albayrak
Service Quality dimensions
More difficult to define than to define product quality
Tangibles Service reliability Assurance
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by Ozlem Albayrak
Differing Functional Perspectives on Quality
Engineering Operations Strategic Management Marketing Financial Human Resources
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by Ozlem Albayrak
Engineering
Engineering is an applied science.– Product Design Engineering– Concurrent Engineering (simultaneous
performance)
Statistics + technical orientation
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by Ozlem Albayrak
Design Life Cycle
Idea Generation
Preliminary Design
Prototype Development
Final Definition
Product Design Evaluation
Implementation
Iterations
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by Ozlem Albayrak
Operations
Focus was initially on statistical process control Uses system view underlying modern quality
management thinking
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by Ozlem Albayrak
Strategic Management
Refers to the planning processes Long term orientation
Goal: to achieve sustainable competititve advantage
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by Ozlem Albayrak
Generic Strategic Planning Process (1)
Firm Mission and Goals
Strategic Options
Business level strategy
Corporate level strategy
Operational Subplans
External analysis Internal analysis
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by Ozlem Albayrak
Generic Strategic Planning Process (2)
Operational Subplans
Conflict Politics and Change
Organizational Reward System
OrganizationalDesign
Strategic Alignment betweenStructure and Goals
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Marketing
Customer satisfaction
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Financial
Risk of investment vs. Potential rewards
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by Ozlem Albayrak
Deming Value Chain
Improve quality
Cost decrease
Productivity Improves
Capture the market
Stay in business
Provide Jobs and more jobs
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by Ozlem Albayrak
Human Resources
Employee empowerment Job analysis Total quality human resources management
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by Ozlem Albayrak
The Three Spheres of Quality
Quality Management
Quality Assurance
Quality Control
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Quality Control
Scientific method includes:– Analysis ( a process is broken into fundamental
pieces)– Relation (relationships between parts)– Generalization (how interrelationships apply to the
larger phenomenon of quality being studied)
Quality Control
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by Ozlem Albayrak
Quality Control Activities
Monitoring process capability and stability Measuring process performance Reducing process variability Optimizing processes to nominal measures Performing acceptance sampling Developing and maintaining control charts
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by Ozlem Albayrak
Quality Assurance
Activities associated with guaranteering the quality of a product or service.
Quality Assurance
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Quality Assurance Activities
Failure mode and effect analysis Concurrent Engineering Experimental Design Process improvement Design team formation management Off-line experimentation Reliability/durability product testing
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by Ozlem Albayrak
Quality Management
Management processes that overarch and tie toegther the control and assurance activities make up quality management.
Quality Management
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Quality Management Activities
Planning for quality improvement Creating a quality organizational culture Providing leadership and support Providing training and re-training Designing a system to reinforce quality ideals Facilitating organizational communication
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Other perspectives
Value Added Perspective Cultural Perspectives
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by Ozlem Albayrak
Contingency Theory
There is no theory or method for operating a business that can be applied in all instances.
This provides flexibility to managers in pursuing quality.
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Summary
Different perspectives on quality management Quality sphere is composed of:
– Quality Control– Quality Assurance– Quality Management
Discussion Questions
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by Ozlem Albayrak
Quality Example
Define high quality toilette paper? Single (5 min) In groups of two (5 min) Reviews....... One address for the class and registration to
the group.... Do not wait for invitation register
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by Ozlem Albayrak
CTIS 494
Software Quality Assuranceby
Dr. Ozlem Albayrak
2007 Fall
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by Ozlem Albayrak
A Practical Approach to Software Quality
Book by
G. O’Regan
Slides by
Dr. Ozlem Albayrak
2006 Spring
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by Ozlem Albayrak
Outline
Software Engineering Challenge History of Software Failures Background to Software Quality History of Quality Software Engineering Modern Software Quality Management
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by Ozlem Albayrak
Software Engineering Challenge
Challenge is to deliver:High quality software on time to the customer
Focus on customer satisfaction
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by Ozlem Albayrak
Software Engineering Challenge
Overestimation How to estimate cost and schedule accurately
is a big challenge Risk management is key Example: Taurus project at London Stock
Exchange was 13,200% late and costed a lot, and abondened
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by Ozlem Albayrak
Software Engineering Challenge
Changing requirements In civil engineering there are also problems Software eng. Less mature than civil eng.
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by Ozlem Albayrak
History of Software Failures
Y2K problem– Find and analyze all code with a Y2K impact– Plan and make necessary changes– Cost to UK is $32 billion!!!
Software quality needs to be a key driving factor
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by Ozlem Albayrak
Introduction to Software Quality(2)
History of Quality– Shewart– Deming– Juran– Crosby– Other Quality Gurus
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by Ozlem Albayrak
Background to Software Quality
Customers have high expectations In the market there are many high quality
companies Late delivery leads to extra cost
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by Ozlem Albayrak
Background to Software Quality (2)
What is software quality– “Conformance to the requirements” Crosby– “Fitness for use” Juran
– ISO 9126 standard for information technology
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by Ozlem Albayrak
ISO 9126 – Quality Characteristics
Functionality: extent to which functions are avaliable Reliability: extent to which software reliable Usability: users say easy to use
Efficiency Maintainability: easy to maintain Portability: easy to transfer do different environments
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by Ozlem Albayrak
Total Quality Management
Modern approach to quality management is TQM– Customer focus– Process improvement– Development of quality culture
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by Ozlem Albayrak
Software Quality Control
Extensive inspections and testing Formal reviews Aim is to identify defects White box and black box tests Unit, function, subsystem, system,
performance, integration, acceptance tests
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by Ozlem Albayrak
History of Quality
Shewhart– Statistian at AT&T, 1920s– PDCA Model
Plan Do Check Act
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by Ozlem Albayrak
History of Quality (2)
Deming– 1945s, Japan– 14 step programme– Consistent purpose and direction in the organization
is more important then everyone doing his best alone
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by Ozlem Albayrak
History of Quality (3)
Juran– Another giant in the quality movement– Fitness for use– 10 step programme
Crosby– Has influenced CMM (Capability Maturity Model)
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by Ozlem Albayrak
Other Quality Gurus
Taguchi Ishikawa Feigenbaum
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by Ozlem Albayrak
Introduction to Software Quality(3)
Software Engineering– Requirements Analysis– Specification– Design
Architectural Functional Object-oriented reuse Verification of Design
– Implementation
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by Ozlem Albayrak
Introduction to Software Quality(4)
– Implementation– Testing
Unit Integration Sub-system System Performance Acceptance
– Maintenance
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by Ozlem Albayrak
Maintenance
1st Malcom Baldridge Quality award to Motorola Steps of Six Sigma:
– Identify product or service– Identify customer and requirements– Identify needs to satisfy customer– Define process of doing work– Eliminate waste– Ensure continious improvement by:
Measuring, analyzing and controlling improved process
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by Ozlem Albayrak
Modern Software Quality Management
Software Inspections Software Testing Software Quality Assurance Problem Solving
– Fishbone diagrams - Trend Graph– Histograms - Scatter Graphs– Pareto Chart - Failure Mode Effect Analysis
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by Ozlem Albayrak
Modern Software Quality Management(2)
Modeling Cost of Quality Metrics Customer Satisfation Assessments Total Quality Management
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by Ozlem Albayrak
Metrics
Measurement is important part of science and engineering
Goal Question Metric by Basili
Data, Charts, Analysis, Trends, Action
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by Ozlem Albayrak
Customer Satisfaction
Execute Plan
Customer Saticfaction Surveys
Customer Saticfaction Measurement
Improvement Planning
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by Ozlem Albayrak
Formal Methods
Advantage:– Utilization of mathematical models are being used– Lead to more robust(gürbüz) systems
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by Ozlem Albayrak
Modern Software Quality Management
Future of Software Quality Organizational Culture and Change Formal Methods Quality and the Web
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by Ozlem Albayrak
Quality and the WEB
Accesss from everywhere in the world May different browsers Usability, look and feel important Performance as key concept Security Many transactions at any time Avaliability (24x365) RelaibilityJAD/RAD with spiral development suggested
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by Ozlem Albayrak
End of Musical notes
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by Ozlem Albayrak
Review Next class:
Search web for software quality assurance
Come to class to discuss