Which of the following is not one of three software product aspects addressed by McCall’s software quality factors ?
Production costs and scheduling
McCall's quality model (1977), described in Pressman, groups eleven software quality factors under three important aspects of a software product.
Step 1 — Product operation covers its operational characteristics: correctness, reliability, efficiency, integrity and usability.
Step 2 — Product revision covers its ability to undergo change: maintainability, flexibility and testability.
Step 3 — Product transition covers its adaptability to new environments: portability, reusability and interoperability.
So ability to undergo change, adaptability to new environments and operational characteristics are exactly the three aspects of the model. Production costs and scheduling are project-management concerns handled by estimation and planning; they are not a quality aspect of the product and are not part of McCall's triangle.
Production costs and scheduling option is correct.
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