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Software Testing and Quality Assurance Theory and Practice Chapter 17 Software Quality - page 9 / 28

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Software Testing and QA Theory and Practice (Chapter 17: Software Quality)

© Naik & Tripathy

9

Five Views of Software Quality

Measurement of manufacturer’s view

Manufacturers are interested in defect count and rework cost.

Defect count: The total number of defects detected during development and operation.

It is a measure of the quality of the work produced.

One can analyze the defects as follows.

For each defect, identify the development phase in which it was introduced.

Categorize the defects, say, based on modules.

Normalize defect count by product size.

Defect density: Number of defects per 1000 lines of code.

Separate the defects found during operation from those found during development.

Rework cost: How much does it cost to fix the known defects?

Development rework cost: This is the rework cost incurred before a product is released. This is a measure of development efficiency.

Operation rework cost: This is the rework cost incurred when a product is in operation. This is a measure of the delivered quality.

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