Reference numbe
r
ISO/IEC 25010:2011(E)
©
ISO/IEC 2011
INTERNATIONAL
STANDARD
ISO/IEC
25010
First edition
2011-03-01
Systems and software engineering —
Systems and software Quality
Requirements and Evaluation
(SQuaRE) — System and software quality
models
Ingénierie des systèmes et du logiciel — Exigences de qualité et
évaluation des systèmes et du logiciel (SQuaRE) — Modèles de qualité
du système et du logiciel
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ISO/IEC 25010:2011(E)
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ii
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ISO/IEC 25010:2011(E)
© ISO/IEC 2011 – All rights reserved iii
Contents Page
Foreword ............................................................................................................................................................iv
Introduction.........................................................................................................................................................v
1 Scope......................................................................................................................................................1
2 Conformance .........................................................................................................................................2
3 Quality model framework......................................................................................................................2
3.1 Quality models.......................................................................................................................................2
3.2 Quality in use model .............................................................................................................................3
3.3 Product quality model...........................................................................................................................3
3.4 Targets of the quality models ..............................................................................................................4
3.5 Using a quality model ...........................................................................................................................5
3.6 Quality from different stakeholder perspectives ...............................................................................5
3.7 Relationship between the models .......................................................................................................7
4 Terms and definitions ...........................................................................................................................8
4.1 Quality in use model .............................................................................................................................8
4.2 Product quality model.........................................................................................................................10
4.3 General .................................................................................................................................................16
4.4 Terms and definitions from ISO/IEC 25000.......................................................................................18
Annex A (informative) Comparison with the quality model in ISO/IEC 9126-1...........................................21
Annex B (informative) Example of mapping to dependability......................................................................24
Annex C (informative) Using the quality model for measurement...............................................................26
Bibliography......................................................................................................................................................33
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ISO/IEC 25010:2011(E)
iv © ISO/IEC 2011 – All rights reserved
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 25010 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 7, Software and systems engineering.
This first edition of ISO/IEC 25010 cancels and replaces ISO/IEC 9126-1:2001, which has been technically
revised.
ISO/IEC 25010 is a part of the SQuaRE series of International Standards, which consists of the following
divisions:
• Quality Management Division (ISO/IEC 2500n),
• Quality Model Division (ISO/IEC 2501n),
• Quality Measurement Division (ISO/IEC 2502n),
• Quality Requirements Division (ISO/IEC 2503n),
• Quality Evaluation Division (ISO/IEC 2504n),
• SQuaRE Extension Division (ISO/IEC 25050 – ISO/IEC 25099).
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ISO/IEC 25010:2011(E)
© ISO/IEC 2011 – All rights reserved v
Introduction
Software products and software-intensive computer systems are increasingly used to perform a wide variety
of business and personal functions. Realization of goals and objectives for personal satisfaction, business
success and/or human safety relies on high-quality software and systems. High-quality software products and
software-intensive computer systems are essential to provide value, and avoid potential negative
consequences, for the stakeholders.
Software products and software-intensive computer systems have many stakeholders including those who
develop, acquire, use, or who are customers of businesses using software-intensive computer systems.
Comprehensive specification and evaluation of the quality of software and software-intensive computer
systems is a key factor in ensuring value to stakeholders. This can be achieved by defining the necessary and
desired quality characteristics associated with the stakeholders' goals and objectives for the system. This
includes quality characteristics related to the software system and data as well as the impact the system has
on its stakeholders. It is important that the quality characteristics are specified, measured, and evaluated
whenever possible using validated or widely accepted measures and measurement methods. The quality
models in this International Standard can be used to identify relevant quality characteristics that can be further
used to establish requirements, their criteria for satisfaction and the corresponding measures.
This International Standard is derived from ISO/IEC 9126:1991, Software engineering — Product quality,
which was developed to support these needs. It defined six quality characteristics and described a software
product evaluation process model.
ISO/IEC 9126:1991 was replaced by two related multipart standards: ISO/IEC 9126, Software engineering —
Product quality and ISO/IEC 14598, Software engineering — Product evaluation.
This International Standard revises ISO/IEC 9126-1:2001, and incorporates the same software quality
characteristics with some amendments.
• The scope of the quality models has been extended to include computer systems, and quality in use from
a system perspective.
• Context coverage has been added as a quality in use characteristic, with subcharacteristics context
completeness and flexibility.
• Security has been added as a characteristic, rather than a subcharacteristic of functionality, with
subcharacteristics confidentiality, integrity, non-repudiation, accountability and authenticity.
• Compatibility (including interoperability and co-existence) has been added as a characteristic.
• The following subcharacteristics have been added: functional completeness, capacity, user error
protection, accessibility, availability, modularity and reusability.
• The compliance subcharacteristics have been removed, as compliance with laws and regulations is part of
overall system requirements, rather than specifically part of quality.
• The internal and external quality models have been combined as the product quality model.
• When appropriate, generic definitions have been adopted, rather than using software-specific definitions.
•
Several characteristics and subcharacteristics have been given more accurate names.
Full details of the changes are in Annex A.
This International Standard is intended to be used in conjunction with the other parts of the SQuaRE series of
International Standards (ISO/IEC 25000 to ISO/IEC 25099), and with ISO/IEC 14598 until superseded by the
ISO/IEC 2504n series of International Standards.
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