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Module 3: Software Design & Metrics

20227m

What is software quality? Discuss software quality attributes.

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Software Quality

Degree to which software satisfies stated and implied needs (IEEE). See Q123.

Quality Attributes (McCall / ISO 9126)

Product Operation:

  • Correctness, Reliability, Efficiency, Integrity, Usability

Product Revision:

  • Maintainability, Flexibility, Testability

Product Transition:

  • Portability, Reusability, Interoperability

ISO 9126 adds: Functionality, Reliability, Usability, Efficiency, Maintainability, Portability.

Each factor has metrics (e.g., Reliability = MTBF).

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