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

© Naik & Tripathy

10

McCall’s Quality Factors and Criteria

Quality Factors

McCall, Richards, and Walters studied the concept of  software quality in terms of two key concepts as follows:

quality factors, and

quality criteria.

A quality factor represents the behavioral characteristic of a system.

Examples: correctness, reliability, efficiency, testability, portability, …

A quality criterion is an attribute of a quality factor that is related to software development.

Example:

Modularity is an attribute of the architecture of a software system.

A highly modular software allows designers to put cohesive components in one module, thereby increasing the maintainability of the system.

McCall et al. identified 11 quality factors (Table 17.1.)

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