International Organization for Standardization

Software engineering - Product quality - Part 4: Quality in use metrics - First Edition
 N ISO/IEC TR 9126-4

Annotation

This Technical Report defines quality in use metrics for the characteristics defined in ISO/IEC 9126-1, and is intended to be used together with ISO/IEC 9126-1.

This Technical Report contains:

• an explanation of how to apply software quality metrics;

• a basic set of metrics for each characteristic;

• an example of how to apply metrics during the software product life cycle.

It includes as informative annexes a quality in use evaluation process and a reporting format.

This Technical Report does not assign ranges of values of these metrics to rated levels or to grades of compliance, because these values are defined for each software product or a part of the software product, by its nature, depending on such factors as category of the software, integrity level and users? needs. Some attributes may have a desirable range of values, which does not depend on specific user needs but depends on generic factors, i.e. human cognitive factors.

This Technical Report can be applied to any kind of software for any application. Users of this Technical Report can select or modify and apply metrics and measures from this Technical Report or may define application-specific metrics for their individual application domain. For example, the specific measurement of quality characteristics such as safety or security may be found in International Standards or Technical Reports provided by IEC 65 and ISO/IEC JTC1/SC 27.

Intended users of this Technical Report include: