NBN ISO/IEC 25022:2021

This International Standard defines quality in use measures for the characteristics defined in
ISO/IEC 25010, and is intended to be used together with ISO/IEC 25010. It can be used in conjunction
with the ISO/IEC 2503n and the ISO/IEC 2504n standards or to more generally meet user needs with
regard to product or system quality.
This International Standard contains the following:
— a basic set of measures for each quality in use characteristic;
— an explanation of how quality in use is measured.
This International Standard provides a suggested set of quality in use measures to be used with the
quality in use model in ISO/IEC 25010. They are not intended to be an exhaustive set.
It includes as informative annexes examples of how to measure context coverage (Annex A), options
for normalising quality in use measures (Annex B), use of ISO/IEC 25022 for measuring usability in
ISO 9241-11 (Annex C), a quality in use evaluation process (Annex D), the relationship between different
quality models (Annex E), and quality measurement concepts (Annex F).
The measures are applicable to the use of any human-computer system, including both computer
systems in use and software products that form part of the system.
This International Standard does not assign ranges of values of the measures to rated levels or to grades
of compliance because these values are defined for each system or product depending, on the context of
use and users’ needs.
Some attributes could have a desirable range of values, which does not depend on specific user needs
but depends on generic factors, for example, human cognitive factors.
The proposed quality in use measures are primarily intended to be used for quality assurance and
management of systems and software products based on their effects when actually used. The main
users of the measurement results are people managing development, acquisition, evaluation, or
maintenance of software and systems.
The main users of this International Standard are people carrying out specification and evaluation
activities as part of the following:
— development: including requirements analysis, design, and testing through acceptance during the
life cycle process;
— quality management: systematic examination of the product or computer system, for example, when
evaluating quality in use as part of quality assurance and quality control;
— supply: a contract with the acquirer for the supply of a system, software product, or software service
under the terms of a contract, for example, when validating quality at qualification test;
— acquisition: including product selection and acceptance testing, when acquiring or procuring a
system, software product, or software service from a supplier;
— maintenance: improvement of the product based on quality in use measures.
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ISO/IEC 25022:2016(E)