ISO/IEC 25021:2012

INTERNATIONAL ISO/IEC
STANDARD 25021
First edition
2012-11-01

Systems and software engineering —
Systems and software Quality
Requirements and Evaluation
(SQuaRE) — Quality measure elements
Ingénierie des systèmes et du logiciel — Exigences de qualité et
évaluation des systèmes et du logiciel (SQuaRE) — Éléments de
mesure de la qualité




Reference number
ISO/IEC 25021:2012(E)
©
ISO/IEC 2012

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ISO/IEC 25021:2012(E)

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©  ISO/IEC 2012
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ii © ISO/IEC 2012 – All rights reserved

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ISO/IEC 25021:2012(E)
Contents Page
Foreword . iv
Introduction . v
1  Scope . 1
2  Conformance . 1
3  Normative references . 1
4  Terms and definitions . 2
5  Abbreviated terms . 4
6  Quality measure elements concept . 4
6.1  Presentation of the measurement method model . 4
6.2  Table format of QMEs . 7
Annex A (informative) Examples of QMEs . 12
Annex B (informative) Guide for Designing a Quality Measure Element (QME) . 27
Annex C (informative) Additional Examples of QME and proposed expansion . 30
Annex D (informative) Measurement scale type . 36
Bibliography . 37

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ISO/IEC 25021:2012(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 25021 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information t
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