1、BSI Standards PublicationBS ISO/IEC 25063:2014Systems and softwareengineering Systems andsoftware product QualityRequirements and Evaluation(SQuaRE) Common IndustryFormat (CIF) for usability:Context of use descriptionCopyright British Standards Institution Provided by IHS under license with BSI - Un
2、controlled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO/IEC25063:2014.The UK participation in its preparation was entrusted to TechnicalCommittee IS
3、T/15, Software and systems engineering.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Inst
4、itution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 73276 8ICS 35.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2014.Amendments issued
5、 since publicationDate Text affectedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014Systems and software engineering Systems and software product
6、 Quality Requirements and Evaluation (SQuaRE) Common Industry Format (CIF) for usability: Context of use descriptionIngnierie des systmes et du logiciel Exigences de qualit et valuation des systmes et du logiciel (SQuaRE) Format industriel commun (CIF) pour lutilisabilit: Description du contexte dut
7、ilisation ISO/IEC 2014INTERNATIONAL STANDARDISO/IEC25063First edition2014-03-15Reference numberISO/IEC 25063:2014(E)Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS
8、 ISO/IEC 25063:2014ISO/IEC 25063:2014(E)ii ISO/IEC 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO/IEC 2014All 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 ph
9、otocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09
10、47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014ISO/IEC 25063:2014(E) ISO/IEC 201
11、4 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Conformance . 13 Terms and definitions . 14 Purposes and types of context of use descriptions . 44.1 General . 44.2 Initial outline of the context of use 64.3 Detailed context of use descriptions 64.4 Context of use for an e
12、valuation . 74.5 Context of use information included in a product description 75 Elements of a context of use description . 85.1 General . 85.2 Subject of the context of use description . 95.3 User population . 105.4 Goals and responsibilities of the user group and the organization 135.5 Tasks of th
13、e users . 145.6 Environment(s) of the user . 165.7 Problems . 18Annex A (informative) Initial outline of the context of use 20Annex B (informative) Users of the context of use 21Annex C (informative) Example of a context of use checklist 23Bibliography .32Copyright British Standards Institution Prov
14、ided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014ISO/IEC 25063:2014(E)ForewordISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)
15、 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 I
16、EC 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 J
17、TC 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
18、 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 o
19、r 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
20、ISO/IEC 2014 All rights reservedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014ISO/IEC 25063:2014(E)IntroductionThe human-centred design approac
21、h of ISO 9241-2104is 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 informa
22、tion 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 interac
23、tive 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/IEC TR 2506019and is part of the SQuaRE serie
24、s (ISO/IEC 2500017to 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 nor
25、mally 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; Eval
26、uation 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 StandardsContext of use is defined in ISO 9241-11.2Th
27、e system quality model in ISO/IEC 2501018incorporates context of use. ISO/IEC 2014 All rights reserved vCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 250
28、63:2014ISO/IEC 25063:2014(E)Figure 2 Relationship of CIF documents to user centred design in ISO 9241-2104and system life cycle processes in ISO/IEC 152887Figure 2 illustrates the interdependence of these information items with the human-centred design activities described in ISO 9241-2104as well as
29、 the corresponding System Life Cycle processes described in ISO/IEC 15288.7The 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
30、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 d
31、ocumented 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 develop
32、ed during the Stakeholders Requirements Definition Process described in ISO/IEC 15288.7The “Produce design solutions” activity focuses on designing user interaction that meets user requirements. This activity takes place during the Architectural Design, Implementation, and Integration processes desc
33、ribed in ISO/IEC 152887and 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
34、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 2506220can support the ISO/IEC 152887validation process that confirms that the system complies with the stakeholder requi
35、rements.vi ISO/IEC 2014 All rights reservedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014INTERNATIONAL STANDARD ISO/IEC 25063:2014(E)Systems an
36、d software engineering Systems and software product Quality Requirements and Evaluation (SQuaRE) Common Industry Format (CIF) for usability: Context of use description1 ScopeThis International Standard specifies the contents of both high-level and detailed descriptions of context of use for an exist
37、ing, 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 pa
38、rt 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
39、 process model.NOTE For the purpose of establishing process models, ISO/IEC TR 2477416and ISO/IEC 15504-29specify the format and conformance requirements for process models, respectively. In addition, ISO/IEC 152898defines the types and content of information items developed and used in process mode
40、ls for system and software life cycle management. ISO/IEC 15504-510and ISO/IEC 15504-611define 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 i
41、n ISO/TR 1852913and ISO/TS 1815212, 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 con
42、text of use description, it does not prescribe any particular structure or layout for documenting the context of use.2 ConformanceA 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 definitionsFor the
43、purposes of this document, the following terms and definitions apply.3.1accessibilityextent 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 c
44、ontext of useNote 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 1Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction o
45、r networking permitted without license from IHS-,-,-BS ISO/IEC 25063:2014ISO/IEC 25063:2014(E)3.2context of useusers, tasks, equipment (hardware, software and materials), and the physical and social environments in which a system, product or service is usedSOURCE: ISO 9241-11:1998, 3.5, modified In
46、the definition, “product” has been replaced by “system, product or service”.Note 1 to entry: In this International Standard, equipment is described as part of the technical and technological environment.3.3effectivenessaccuracy and completeness with which users achieve specified goalsSOURCE: ISO 924
47、1-11:1998, 3.23.4efficiencyresources expended in relation to the accuracy and completeness with which users achieve goalsSOURCE: ISO 9241-11:1998, 3.33.5goalintended outcomeSOURCE: ISO 9241-11:1998, 3.83.6human-centred designapproach to system design and development that aims to make interactive sys
48、tems more usable by focusing on the use of the system; applying human factors, ergonomics and usability knowledge and techniquesNote 1 to entry: The term “human-centred design” is used rather than “user-centred design” in order to emphasize that this standard also addresses impacts on a number of stakeholders, not just those typically considered as users. However, in practice, these terms are often used synonymously.Note 2 to entry: Usable systems can provide a number of benefits including improved productivity, enhanc
