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Which of the following is not one of three software product aspects addressed by McCall's software quality factors?

Pick an option to check yourself, or open the answer below.

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Correct answer: D. Production costs and scheduling

Explanation

McCall's quality model groups its eleven quality factors under exactly three product aspects: product operation = operational characteristics (correctness, reliability, efficiency, integrity, usability); product revision = ability to undergo change (maintainability, flexibility, testability); and product transition = adaptability to new environments (portability, reusability, interoperability). Options 1, 2 and 3 therefore each name one of the three aspects. Production costs and scheduling is a project-management concern, not a product-quality aspect in McCall's framework, so it is the one that does not belong.

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