ISO/IEC 25063:2014

DRAFT INTERNATIONAL STANDARD ISO/IEC DIS 25063.2
ISO/IEC JTC 1 Secretariat: ANSI

Voting begins on Voting terminates on
2012-09-23 2012-11-23
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION  МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОММИСИЯ  COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

Systems and software engineering — Systems and software
product Quality Requirements and Evaluation (SQuaRE) —
Common Industry Format (CIF) for usability: Context of use
description
Ingénierie des systèmes et du logiciel — Exigences de qualité et évaluation des systèmes et du logiciel
(SQuaRE) — Format industriel commun (CIF) pour l'utilisabilité: Description du contexte d'utilisation
ICS 35.080
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
International Organization for Standardization, 2012
©
International Electrotechnical Commission, 2012

ISO/IEC DIS 25063.2
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's
member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO/IEC 2012 — All rights reserved

ISO/IEC DIS 25063.2
Contents Page
Foreword . 4!
Introduction . 5!
1! Scope . 7!
2! Conformance . 7!
3! Terms and Definitions . 7!
4! Purposes and types of context of use descriptions . 11!
4.1! General . 11!
4.2! Initial outline of the context of use . 11!
4.3! Detailed description of the context of use . 11!
4.3.1! Current context of use . 11!
4.3.2! Intended context of use . 12!
4.3.3! Context of use specified as part of user requirements . 12!
4.3.4! Context of use of the implemented system . 12!
4.3.5! Context of use of the deployed system . 12!
4.4! Context of use for evaluation . 13!
4.5! Context of use information included in a product description . 13!
5! Elements of a context of use description . 13!
5.1! General . 13!
5.1.1! Overview of requirements and recommendations . 13!
5.1.2! Scope of the context of use . 15!
5.2! Subject of the context of use description . 15!
5.2.1! System, product or service and purpose . 15!
5.2.2! Preconditions and constraints . 15!
5.3! User population . 16!
5.3.1! Users and other stakeholder groups . 16!
5.3.2! The characteristics of each user group . 16!
5.4! Goals and responsibilities of the user group and the organization . 18!
5.4.1! User group goals . 18!
5.4.2! Organizational goals and policies . 19!
5.4.3! Responsibilities . 19!
5.5! Tasks of the users . 19!
5.5.1! Task attributes . 19!
5.5.2! Task representations . 20!
5.6! Environment(s) of the user . 20!
5.6.1! General . 20!
5.6.2! Technical and technological environment . 20!
5.6.3! Social/organizational environment . 21!
5.6.4! Physical environment . 21!
5.7! Problems . 22!
5.7.1! General . 22!
5.7.2! Problems . 22!
5.7.3! Deficiencies in effectiveness, efficiency or satisfaction . 22!
Annex A (informative) Context of use as part of human-centred design . 24!
A.1! Context of use in relation to Human-Centred Design and other CIFs . 24!
A.2! Initial outline of the context of use . 25!
A.3! Scope of the context of use . 26!
A.4! Generic procedure for developing context of use descriptions during design and
!
development . 27
Annex B (informative) Users of the context of use . 30!
© ISO/IEC – All rights reserved 2

ISO/IEC DIS 25063.2
Annex C (informative) Relationship to ISO/IEC 25010 quality characteristics . 32!
Annex D (informative) Example of a context of use checklist . 33!
Bibliography . 42!

3 © ISO/IEC – All rights reserved

ISO/IEC DIS 25063.2
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In exceptional circumstances, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard (“state of the art”, for example), it may decide by a
simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely
informative in nature and does not have to be reviewed until the data it provides are considered to be no
longer valid or useful.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 25063 was prepared by Technical Committee ISO/TC JTC1, Information Technology, Subcommittee
SC SC7, Software and System Engineering in conjunction with ISO/TC 159 Ergonomics SC 4 Human-System
Interaction.
© ISO/IEC – All rights reserved 4

ISO/IEC DIS 25063.2
Introduction
The human-centred design approach of ISO 9241-210 is well established and focuses specifically on making
systems usable. Usability can be achieved by applying human-centred design and testing throughout the
lifecycle. In order to enable a human-centred approach to be adopted, it is important that all the relevant types
of information related to usability (information items) are identified and communicated. This identification and
communication enables the usability of a system to be designed and tested.
This International Standard provides a framework and consistent terminology for describing the context of use
of an interactive system. It is intended to assist developers in documenting and communicating usability-
related information through the system development life cycle.
The elements of the context of use are a useful framework for defining, describing and thinking about the
boundary of a system, and addressing influences and affects across this boundary.
The Common Industry Format (CIF) for Usability family of International Standards is described in
ISO TR 25060 and is part of the SQuaRE series (ISO/IEC 25000 – ISO/IEC 25099) of standards on systems
and software product quality requirements and evaluation.
The CIF family of standards uses definitions that are consistent with the ISO 9241 series of standards
(Ergonomics of human system interaction), as this is the terminology that is normally used for this subject
matter.
CIF standards are planned for the following information items:
! Context of use description (ISO/IEC 25063);
! User needs report (ISO/IEC 25064);
! User requirements specification;
! User interaction specification;
! User interface specification;
! Usability evaluation report;
! Field data report;
5 © ISO/IEC – All rights reserved

ISO/IEC DIS 25063.2
Figure 1 Relationship of CI
...

DRAFT INTERNATIONAL STANDARD ISO/IEC DIS 25063
ISO/IEC JTC 1 Secretariat: ANSI

Voting begins on Voting terminates on
2011-09-29 2012-02-29
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION  МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОММИСИЯ  COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

Systems and software engineering — Systems and software
product Quality Requirements and Evaluation (SQuaRE) —
Common Industry Format (CIF) for usability: Context of use
description
Ingénierie des systèmes et du logiciel — Exigences de qualité et évaluation des systèmes et du logiciel
(SQuaRE) — Format industriel commun (CIF) pour l'utilisabilité: Description du contexte d'utilisation
ICS 35.080
In accordance with the provisions of Council Resolution 21/1986 this DIS is circulated in the
English language only.
Conformément aux dispositions de la Résolution du Conseil 21/1986, ce DIS est distribué en
version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
International Organization for Standardization, 2011
©
International Electrotechnical Commission, 2011

ISO/IEC DIS 25063
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's
member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO/IEC 2011 — All rights reserved

ISO/IEC DIS 25063
Contents Page
Foreword 3
Introduction 4
Scope 5
Conformance 6
Normative references 6
Terms and Definitions 6
Purposes of context of use descriptions 9

5.1
Context of use in relation to Human-Centred Design and other CIFs 9

5.2
Initial high-level description of the assumed context of use 11

5.3
Detailed description of the context of use for the existing system, for the intended
system, or for the implemented system 12

5.3.1
Current context of use 12
5.3.2
Intended context of use 12
5.3.3
Specified context of use as part of user requirements 12

5.3.4
Context of use of the implemented system Error! Bookmark not defined.

5.3.5
Context of use of the deployed system 13

5.4
Context of evaluation 13
5.5
Context of use as part of a product description 13

Elements of a context of use description 13

6.1
General requirements and recommendations 13

6.2
Subject of the context of use description 14

6.2.1
System, product or service 14
6.2.2
Preconditions and constraints 14

6.3
User population 15
6.3.1
Users and other stakeholder groups 15

6.3.2
The characteristics of each user group 15

6.4
Goals 17
6.4.1
User goals 17
6.4.2
Organizational goals 17
6.5
Tasks 18
6.5.1
Task attributes 18
6.5.2
Task representations 18
6.6
Environment 19
6.6.1
General 19
6.6.2
Technical environment 19
6.6.3
Social/organizational environment 19

6.6.4
Physical environment 20
Annex A (informative) Overview of context of use elements 21

Annex B (Informative) Generic process for developing context of use descriptions
during design and development 23

Annex C (Informative) Users of the context of use 25

Annex D Relationship to ISO/IEC 25010 quality characteristics 27

Annex E (Informative) Example of a context of use checklist 28

Annex F Bibliography 36
DRAFT 2011
ISO/IEC DIS 25063
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national
standards bodies (ISO member bodies). The work of preparing International Standards is normally
carried out through ISO technical committees. Each member body interested in a subject for which a
technical committee has been established has the right to be represented on that committee.
International organizations, governmental and non-governmental, in liaison with ISO, also take part
in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives,
Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
In exceptional circumstances, when a technical committee has collected data of a different kind from
that which is normally published as an International Standard ³VWDWHRIWKHDUW´IRUH[DPSOHLWPD\
decide by a simple majority vote of its participating members to publish a Technical Report. A
Technical Report is entirely informative in nature and does not have to be reviewed until the data it
provides are considered to be no longer valid or useful.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 25063 was prepared by Technical Committee ISO/TC JTC1, Information Technology,
Subcommittee SC SC7, Software and System Engineering in conjunction with ISO/TC 159
Ergonomics SC 4 Human-System Interaction.
DRAFT 2011
ISO/IEC DIS 25063
Introduction
The human-centred design approach of ISO 9241-210 is well established and focuses specifically on
making systems usable. Usability can be achieved by applying human-centred design and testing
throughout the lifecycle. In order to enable a human-centred approach to be adopted, it is important
that all the relevant types of information related to usability (information items) are identified and
communicated. This identification and communication enables the usability of a system to be
designed and tested.
This International Standard provides a framework and consistent terminology for describing the
context of use of an interactive system. It is intended to assist developers in documenting and
communicating usability-related information through the system development life-cycle.
The Common Industry Format (CIF) for Usability family of International Standards is described in
ISO TR 25060 and is part of the SQuaRE series (ISO/IEC 25000 ± ISO/IEC 25099) of standards on
systems and software product quality requirements and evaluation.
The CIF family of standards uses definitions that are consistent with the ISO 9241 series of
standards (Ergonomics of human system interaction), as this is the terminology that is normally used
for this subject matter. In some cases these definitions differ from those in ISO/IEC 25000.
CIF standards are planned for the following information items:
x Context of use description (25063)
x User needs report (25064)
x User requirements specification (25065)
x User interaction specification
x User interface specification
x Usability evaluation report (25066)

Figure 1 Relationship of CIF documents to user centred design in ISO 924-210 and system
lifecycle processes in ISO/IEC 15288
DRAFT 2011
ISO/IEC DIS 25063
Figure 1 illustrates the interdependence of these information items with the human-centred design
activities described in ISO 9241-210 as well as the corresponding System Life Cycle processes
described in ISO/IEC 15288. The figure depicts the activities as a set of intersecting circles. The
circles overlap to represent that the activities are not separate, but rather, overlapping in time and
scope and the outcome of each activity provides the input to one or more other activities. As each
human-centred design activity can provide input to any other, there is no starting point, no endpoint,
or linear process intended.
Human-centred design relies on user needs that are first identified based on the Context of Use
analysis. User needs are documented in the User Needs Report (ISO/IEC 25064), which is an
intermediate deliverable that links the Context of Use Description (ISO/IEC 25063) that contains
Information about the users, their tasks and the organizational and physical environment, to the user
requirements. These items are developed during the Stakeholders Requirements Definition Process
described in ISO/IEC 15288.
7KH³3URGXFHGHVLJQVROXWLRQV´DFWLYLW\IRFXVHVRQGHVLJQLQJXVHULQWHUDFWLRQWKDWPHHWVXVHU
requirements. This activity takes place during the Architectural Design, Implementation, and
Integration SURFHVVHVGHVFULEHGLQ,62,(&DQGSURGXFHVWKHLQIRUPDWLRQLWHPV³8VHU
,QWHUDFWLRQ6SHFLILFDWLRQ´DQGWKH³8VHU,QWHUIDFH6SHFLILFDWLRQ´
7KH³(YDOXDWH´DFWLYLW\VWDUWVDWWKHHDUOLHVWVWDJHVLQWKHSURMHFWHYDOXDWLQJGHVLJQFRQFHSWVWR
obtain a better understanding of the user needs. Design solutions can be evaluated multiple times
as the interactive system is being developed, and can produce various types of evaluation report,
and usability data such as that described in ISO/IEC 25062 can support the ISO/IEC 15288
validation process that confirms that the system complies with the stakeholders requirements.
Systems and software engineering ² Systems and
software product Quality Requirements and Evaluation
(SQuaRE) ² Common Industry Format (CIF) for Usability:
Context of Use Description
1 Scope
This International Standard specifies the contents of both high-level and detailed descriptions of
context of use for an existing, intended, designed or implemented system.
The context of use description is applicable to software and hardware systems, products or services
(excluding generic products, such as a display screen or keyboard). The description of the context of
use is intended to be used as part of system-level documentation resulting from development
processes such as those in ISO 9241-210 and ISO/IEC JTC1/SC7 process standards.
This International Standard does not prescribe any kind of method, lifecycle or process. To ensure
that this information item can be used within the broadest range of process models and used in
combination with other information items, the descriptions are given in the format defined in ISO/IEC
15289 and ISO/IEC 15504-6.
The context of use information item can be integrated in any type of process models. For the
purpose of establishing process models, ISO/IEC 24774 and ISO/IEC 15504-2 specify the format
and conformance requirements for process models respectively. In addition ISO/IEC 15289 defines
the types and content of information items developed and used in process models for system and
software lifecycle management. ISO/IEC 15504-5 and 6 define work products, including information
items, for the purpose of process capability assessment. Process models and associated information
items for human-centred design of interactive systems are contained in ISO TR 18529 and ISO PAS
18152 respectively.
This International Standard also describes the rationale to generate context of use descriptions, and
identifies the intended users of context of use descriptions. An exemplary process to create context
of use descriptions is given Annex B.
DRAFT 2011
ISO/IEC DIS 25063
2 Conformance
A description of the context of use conforms to this International Standard if it contains all the
required elements specified in clause 6. An explanation of the basis for the judgements made in 6.1,
6.3.2.1, 6.3.2.2, 6.3.2.3, 6.4.2, 6.5.1, 6.5.2, 6.6.3 and 6.6.4 shall be provided.
3 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document, (including any amendments) applies.
None?
4 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
4.1
accessibility
extent to which products, systems, services, environments and facilities can be used by people from
a population with the widest range of characteristics and capabilities to achieve a specified goal in a
specified context of use
NOTE Context of use includes direct use or use supported by assistive technologies.
[ISO/FDIS 26800]
4.2
context of evaluation
users, tasks, equipment (hardware, software and materials), and the physical and social
environments in which a product is evaluated
[ISO 20282-2:2006, definition 4.3]
4.3
context of use
users, tasks, equipment (hardware, software and materials), and the physical and social
environments in which a system, product or service is used
NOTE Based on ISO 9241-11:1998.
4.4
effectiveness
accuracy and completeness with whi
...

INTERNATIONAL ISO/IEC
STANDARD 25063
First edition
2014-03-15
Systems and software engineering —
Systems and software product
Quality Requirements and Evaluation
(SQuaRE) — Common Industry Format
(CIF) for usability: Context of use
description
Ingénierie des systèmes et du logiciel — Exigences de qualité et
évaluation des systèmes et du logiciel (SQuaRE) — Format industriel
commun (CIF) pour l’utilisabilité: Description du contexte d’utilisation
Reference number
©
ISO/IEC 2014
© ISO/IEC 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2014 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Conformance . 1
3 Terms and definitions . 1
4 Purposes and types of context of use descriptions . 4
4.1 General . 4
4.2 Initial outline of the context of use . 6
4.3 Detailed context of use descriptions . 6
4.4 Context of use for an evaluation . 7
4.5 Context of use information included in a product description. 7
5 Elements of a context of use description . 8
5.1 General . 8
5.2 Subject of the context of use description . 9
5.3 User population .10
5.4 Goals and responsibilities of the user group and the organization .13
5.5 Tasks of the users .14
5.6 Environment(s) of the user .16
5.7 Problems .18
Annex A (informative) Initial outline of the context of use .20
Annex B (informative) Users of the context of use .21
Annex C (informative) Example of a context of use checklist .23
Bibliography .32
© ISO/IEC 2014 – All rights reserved iii

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 shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 25063 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 7, Software and systems engineering, in collaboration with Technical Committee
ISO/TC 159, Ergonomics, Subcommittee SC 4, Ergonomics of human-system interaction.
iv © ISO/IEC 2014 – All rights reserved

Introduction
[4]
The human-centred design approach of ISO 9241-210 is well established and focuses specifically
on making systems usable. Usability can be achieved by applying human-centred design and testing
throughout the life cycle. In order to enable a human-centred approach to be adopted, it is important
that all the relevant types of information related to usability (information items) are identified and
communicated. This identification and communication enables the usability of a system to be designed
and tested.
This International Standard provides a framework and consistent terminology for describing the context
of use of an interactive system. It is intended to assist developers in documenting and communicating
usability-related information through the system development life cycle.
The Common Industry Format (CIF) for Usability family of International Standards is described in
[19] [17]
ISO/IEC TR 25060 and is part of the SQuaRE series (ISO/IEC 25000 to ISO/IEC 25099) of standards
on systems and software product quality requirements and evaluation.
The CIF family of standards uses definitions that are consistent with the ISO 9241 series of standards
(Ergonomics of human system interaction), as this is the terminology that is normally used for this
subject matter.
CIF standards are planned for the following information items:
— Context of use description (ISO/IEC 25063);
— User needs report (ISO/IEC 25064);
— User requirements specification (planned ISO/IEC 25065);
— User interaction specification;
— User interface specification;
— Evaluation report (planned ISO/IEC 25066);
— Field data report.
The CIF standards are part of the “Extension Division” of the ISO/IEC 25000 “SQuaRE” series of
International Standards (see Figure 1).
Figure 1 — Organization of SQuaRE series of International Standards
[2] [18]
Context of use is defined in ISO 9241-11. The system quality model in ISO/IEC 25010 incorporates
context of use.
© ISO/IEC 2014 – All rights reserved v

[4]
Figure 2 — Relationship of CIF documents to user centred design in ISO 9241-210 and system
[7]
life cycle processes in ISO/IEC 15288
Figure 2 illustrates the interdependence of these information items with the human-centred design
[4]
activities described in ISO 9241-210 as well as the corresponding System Life Cycle processes
[7]
described in ISO/IEC 15288. The figure depicts the activities as a set of intersecting areas. The circles
overlap to represent that the activities are not separate, but rather, overlapping in time and scope and
the outcome of each activity provides the input to one or more other activities. As each human-centred
design activity can provide input to any other, there is no starting point, no end point, or linear process
intended.
Human-centred design relies on user needs that are first identified based on the Context of Use analysis.
User needs are documented in the User Needs Report (ISO/IEC 25064), which is an intermediate
deliverable that links the Context of Use Description (ISO/IEC 25063) that contains Information about
the users, their tasks and the organizational and physical environment, to the user requirements.
These items are developed during the Stakeholders Requirements Definition Process described in
[7]
ISO/IEC 15288.
The “Produce design solutions” activity focuses on designing user interaction that meets user
requirements. This activity takes place during the Architectural Design, Implementation, and Integration
[7]
processes described in ISO/IEC 15288 and produces the information items “User Interaction
Specification” and the “User Interface Specification”.
The “Evaluate” activity starts at the earliest stages in the project, evaluating design concepts to obtain
a better understanding of the user needs. Design solutions can be evaluated multiple times as the
interactive system is being developed, and can produce various types of evaluation report, and usability
[20] [7]
data such as that described in ISO/IEC 25062 can support the ISO/IEC 15288 validation process
that confirms that the system complies with the stakeholder requirements.
vi © ISO/IEC 2014 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 25063:2014(E)
Systems and software engineering — Systems and software
product Quality Requirements and Evaluation (SQuaRE) —
Common Industry Format (CIF) for usability: Context of use
description
1 Scope
This International Standard specifies the contents of both high-level and detailed descriptions of context
of use for an existing, intended, designed or implemented system, product or service.
The context of use description is applicable to software and hardware systems, products or services
(excluding generic products, such as a display screen or keyboard). The description of the context of
use is intended to be used as part of system-level documentation resulting from development processes
such as those in ISO 9241-210 and ISO/IEC JTC 1/SC 7 process standards.
This International Standard does not prescribe any kind of method, life cycle or process.
The context of use information item can be integrated into any type of process model.
[16] [9]
NOTE For the purpose of establishing process models, ISO/IEC TR 24774 and ISO/IEC 15504-2 specify
[8]
the format and conformance requirements for process models, respectively. In addition, ISO/IEC 15289 defines
the types and content of information items developed and used in process models for system and software life cycle
[10] [11]
management. ISO/IEC 15504-5 and ISO/IEC 15504-6 define work products, including information items,
for the purpose of process capability assessment. Process models and associated information items for human-
[13] [12]
centred design of interactive systems are contained in ISO/TR 18529 and ISO/TS 18152 , respectively.
This International Standard also describes the purposes for which context of use descriptions are used,
and identifies the intended users of context of use descriptions.
While this International Standard specifies the required content elements of a context of use description,
it does not prescribe any particular structure or layout for documenting the context of use.
2 Conformance
A description of the context of use conforms to this International Standard if it contains all the required
elements specified in Clause 5.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
accessibility
extent to which products, systems, services, environments and facilities can be used by people from
a population with the widest range of characteristics and capabilities to achieve a specified goal in a
specified context of use
Note 1 to entry: Context of use includes direct use or use supported by assistive technologies.
[SOURCE: ISO 26800:2011, 2.1]
© ISO/IEC 2014 – All rights reserved 1

3.2
context of use
users, tasks, equipment (hardware, software and materials), and the physical and social environments
in which a system, product or service is used
[SOURCE: ISO 9241-11:1998, 3.5, modified — In the de
...

NORME ISO/IEC
INTERNATIONALE 25063
Première édition
2014-03-15
Ingénierie des systèmes et du
logiciel — Exigences de qualité et
évaluation des systèmes et du logiciel
(SQuaRE) — Format industriel
commun (CIF) pour l’utilisabilité:
Description du contexte d’utilisation
Systems and software engineering — Systems and software product
Quality Requirements and Evaluation (SQuaRE) — Common Industry
Format (CIF) for usability: Context of use description
Numéro de référence
©
ISO/IEC 2014
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO/IEC 2014, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
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CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii  © ISO/IEC 2014 – Tous droits réservés

Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Conformité . 1
3 Termes et définitions . 1
4 Objets et types de descriptions de contexte d’utilisation . 5
4.1 Généralités . 5
4.2 Avant-projet du contexte d’utilisation . 6
4.3 Contexte détaillé des descriptions d’utilisation . 6
4.3.1 Contexte d’utilisation actuel . 6
4.3.2 Contexte d’utilisation prévu . 6
4.3.3 Contexte d’utilisation spécifié dans le cadre des exigences utilisateur . 7
4.3.4 Contexte d’utilisation du système, produit ou service mis en œuvre . 7
4.3.5 Contexte d’utilisation du système, produit ou service déployé . 7
4.4 Contexte d’utilisation d’une évaluation . 7
4.5 Informations du contexte d’utilisation contenues dans une description d’un produit . 8
5 Éléments d’une description de contexte d’utilisation . 8
5.1 Généralités . 8
5.1.1 Aperçu des exigences et recommandations . 8
5.1.2 Champ d’application du contexte d’utilisation .10
5.2 Objet de la description du contexte d’utilisation .10
5.2.1 Système, produit ou service et leur objectif .10
5.2.2 Conditions préalables et contraintes .10
5.3 Population d’utilisateurs .11
5.3.1 Utilisateurs et autres groupes de parties prenantes .11
5.3.2 Les caractéristiques de chaque groupe d’utilisateurs .12
5.4 Objectifs/buts et responsabilités du groupe d’utilisateurs et de l’organisation .14
5.4.1 Objectifs/buts du groupe d’utilisateurs .14
5.4.2 Objectifs et politiques des organisations .15
5.4.3 Responsabilités .15
5.5 Tâches des utilisateurs .16
5.5.1 Attributs des tâches . .16
5.5.2 Représentations des tâches .16
5.6 Environnement(s) de l’utilisateur .17
5.6.1 Généralités .17
5.6.2 Environnement technique et technologique .17
5.6.3 Environnement social/organisationnel .18
5.6.4 Environnement physique .18
5.7 Problèmes . .19
5.7.1 Généralités .19
5.7.2 Description des problèmes .19
5.7.3 Lacunes en termes d’efficacité, d’efficience ou de satisfaction .20
Annexe A (informative) Avant-projet du contexte d’utilisation .21
Annexe B (informative) Utilisateurs du contexte d’utilisation .22
Annexe C (informative) Exemple d’une liste de contrôle de contexte d’utilisation .24
Bibliographie .35
© ISO/IEC 2014 – Tous droits réservés iii

Avant-propos
L’ISO (Organisation internationale de normalisation) et l’IEC (Commission électrotechnique
internationale) forment le système spécialisé de la normalisation mondiale. Les organismes
nationaux membres de l’ISO ou de l’IEC participent au développement de Normes internationales
par l’intermédiaire des comités techniques créés par l’organisation concernée afin de s’occuper des
domaines particuliers de l’activité technique. Les comités techniques de l’ISO et de l’IEC collaborent
dans des domaines d’intérêt commun. D’autres organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO et l’IEC, participent également aux travaux. Dans le domaine
des technologies de l’information, l’ISO et l’IEC ont créé un comité technique mixte, l’ISO/IEC JTC 1.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives
ISO/IEC, Partie 2.
La tâche principale du comité technique mixte est d’élaborer les Normes internationales. Les projets de
Normes internationales adoptés par le comité technique mixte sont soumis aux organismes nationaux
pour vote. Leur publication comme Normes internationales requiert l’approbation de 75 % au moins
des organismes nationaux votants.
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenu pour responsable de
ne pas avoir identifié de tels droits de propriété et averti de leur existence.
L’ISO/IEC 25063 a été élaborée par le comité technique mixte ISO/IEC JTC 1, Technologies de
l’information, sous-comité SC 7, Ingénierie du logiciel et des systèmes, en collaboration avec le comité
technique ISO/TC 159, Ergonomie, sous-comité SC 4, Ergonomie de l’interaction homme/système.
iv © ISO/IEC 2014 – Tous droits réservés

Introduction
[4]
L’approche de conception centrée sur l’opérateur humain de l’ISO 9241-210 est bien établie et s’emploie
principalement à rendre les systèmes utilisables. Une conception centrée sur l’opérateur humain et des
essais tout au long du cycle de vie permettent de faciliter l’utilisation (l’utilisabilité) des systèmes. Pour
qu’une approche centrée sur l’opérateur humain puisse être adoptée, il est important d’identifier et de
communiquer tout type d’information pertinente relevant de l’utilisabilité (éléments d’information).
Cette identification et cette communication permettent de concevoir et d’éprouver l’utilisabilité d’un
système.
La présente Norme internationale fournit un cadre et une terminologie cohérents permettant de
décrire le contexte d’utilisation d’un système interactif. Elle a pour but d’aider les développeurs dans la
documentation et la communication d’informations relatives à l’utilisabilité à travers le cycle de vie du
développement de systèmes.
Le Format industriel commun (CIF) applicable à la famille de Normes internationales «Utilisabilité» est
[19] [17]
décrit dans l’ISO/IEC/TR 25060 et fait partie de la série de normes SQuaRE (de l’ISO/IEC 25000
à l’ISO/IEC 25099) relatives aux exigences de qualité et évaluation des systèmes et du produit logiciel.
La famille de normes CIF utilise des définitions qui sont conformes à la série de normes ISO 9241
(Ergonomie de l’interaction homme-système), car il s’agit de la terminologie usuelle propre à ce
domaine.
Les normes CIF sont prévues pour les éléments d’information suivants:
— description du contexte d’utilisation (ISO/IEC 25063);
— rapport sur les besoins de l’utilisateur (ISO/IEC 25064);
— spécification des exigences utilisateur (ISO/IEC 25065 prévue);
— spécification de l’interaction de l’utilisateur;
— spécification de l’interface utilisateur;
— rapport d’évaluation (ISO/IEC 25066 prévue);
— rapport sur les données de terrain.
Les normes CIF font partie de la «Division réservée au développement» de la série «SQuaRE» de Normes
internationales ISO/IEC 25000 (voir Figure 1).
Figure 1 — Organisation de la série SQuaRE de Normes internationales
[2]
Le contexte d’utilisation est défini dans l’ISO 9241-11 . Le modèle de qualité du système dans
[18]
l’ISO/IEC 25010 intègre le contexte d’utilisation.
© ISO/IEC 2014 – Tous droits réservés v

Figure 2 — Relation entre les documents CIF et la conception centrée sur l’utilisateur dans
[4] [7]
l’ISO 9241-210 et les processus du cycle de vie d’un système dans l’ISO/IEC 15288
La Figure 2 illustre l’interdépendance existant entre ces éléments d’information et les activités de
[4]
conception centrée sur l’opérateur humain décrites dans l’ISO 9241-210 , ainsi que les processus
[7]
du cycle de vie du système correspondant décrits dans l’ISO/IEC 15288 . Cette figure présente les
activités sous forme d’un ensemble de zones d’intersection. Les cercles qui se chevauchent représentent
les activités qui ne sont pas distinctes, mais qui, plutôt, se recoupent en termes de durée et de domaine
d’application; ainsi, le résultat de chaque activité fournit des éléments d’entrée à une ou plusieurs
activités. Étant donné que chaque activité de conception centrée sur l’opérateur humain peut fournir
des éléments d’entrée à toute autre activité, cette figure ne présente aucun point de départ, point
d’arrivée ni de processus linéaire.
La conception centrée sur l’opérateur humain repose sur les besoins de l’utilisateur qui sont d’abord
identifiés en fonction de l’analyse du contexte d’utilisation. Les besoins de l’utilisateur sont documentés
dans le Rapport sur les besoins de l’utilisateur (ISO/IEC 25064), qui constitue un livrable intermédiaire
vi © ISO/IEC 2014 – Tous droits réservés

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