What is Quality? Software Quality Engineering
- 2. Part - 1: Overview and Basics. The main concepts that are discussed in this part are: Overview. What is Quality? Quality Assurance, QA in Context, Quality Engineering and the Quality Challenge.
- 3. Part- 1 Overview and Basics
- 4. Summary of the previous lecture What is a software? Characteristics of a Software What is Engineering? What is difference between engineering, manufacturing and construction What is Quality?
- 5. Outlines Meeting People’s Quality Expectations General Expectations Quality Expectations Meeting Quality Expectations Software Quality Engineering (SQE) activities
- 6. Objectives To describe the basics of what is expected as quality To understand and distinguish between people expectations and software quality expectations.
- 7. Meeting People’s Quality Expectations As we previously discussed, if people’s expectations are met in any product, then the product is supposed to have quality in it. Must perform expected behavior.
- 8. General Expectations General expectation: “good” software quality • Objects of our study: software software products, systems, and services stand-alone to embedded software-intensive systems wide variety, but focus on software • Quality (and how “good”) formally defined in Ch.2
- 9. Quality Expectations People: Consumers vs producers . quality expectations by consumers to be satisfied by producers through software quality engineering (SQE) Deliver software system that... . does what it is supposed to do – – needs to be “validated” . does the things correctly – needs to be “verified” . – show/demonstrate/prove it (“does”) – modeling/analysis needed
- 10. Meeting Quality Expectations Difficulties in achieving good quality: size: MLOC products common Complexity environmental stress/constraints flexibility/adaptability expected Other difficulties/factors: product type cost and market conditions
- 11. Major SQE Activities Major SQE Activities: Testing: MLOC products common Other quality assurance alternatives to testing How do you know: analysis & modeling Scope and content hierarchy: Software Quality Engineering Quality Assurance Testing
- 17. Summary of Today’s Lecture We explored the concept of quality from different aspects. We have also seen what is a defect or failure to the quality. Lastly, we talked about the history of the Quality
- 18. Overview of Next lecture QA as Dealing with Defect Defect Prevention Defect Detection and Removal Defect Containment
- 19. The End