EN ISO 9241-171:2008

Ergonomics of human-system interaction - Part 171: Guidance on software accessibility (ISO 9241-171:2008)

ISO 9241-171:2008 provides ergonomics guidance and specifications for the design of accessible software for use at work, in the home, in education and in public places. It covers issues associated with designing accessible software for people with the widest range of physical, sensory and cognitive abilities, including those who are temporarily disabled, and the elderly. It addresses software considerations for accessibility that complement general design for usability as addressed by ISO 9241-110, ISO 9241-11 to ISO 9241-17, ISO 14915 and ISO 13407.
ISO 9241-171:2008 is applicable to the accessibility of interactive systems. It addresses a wide range of software (e.g. office, Web, learning support and library systems).
It promotes the increased usability of systems for a wider range of users. While it does not cover the behaviour of, or requirements for, assistive technologies (including assistive software), it does address the use of assistive technologies as an integrated component of interactive systems.
It is intended for use by those responsible for the specification, design, development, evaluation and procurement of software platforms and software applications.

Ergonomie der Mensch-System-Interaktion - Teil 171: Leitlinien für die Zugänglichkeit von Software (ISO 9241-171:2008)

Dieser Teil von ISO 9241 stellt ergonomische Leitlinien und Anforderungen für die Gestaltung zugänglicher Software zum Einsatz bei der Arbeit, zu Hause, im Bildungswesen und an öffentlichen Plätzen zur Verfügung. Er behandelt Probleme im Zusammenhang mit der Gestaltung von Software, die für Menschen mit einem möglichst breiten Spektrum physischer, sensorischer und kognitiver Fähigkeiten zugänglich ist, einschließlich vorübergehend in ihren Fähigkeiten beeinträchtigter und älterer Menschen. Er enthält Überlegungen zur Softwarezugänglichkeit, die die Festlegungen in ISO 9241 110, ISO 9241 11 bis ISO 9241­17, ISO 14915 und ISO 13407 zur allgemeinen Gestaltung ergänzen.
Dieser Teil von ISO 9241 gilt für die Zugänglichkeit von interaktiven Systemen. Er behandelt ein breites Softwarespektrum (z. B. für Büroanwendungen, das Internet, Lernunterstützung und Bibliothekssysteme).
Er dient der Verbesserung der Gebrauchstauglichkeit von Systemen für eine möglichst große Anzahl von Benutzern. Obgleich er weder das Verhalten von unterstützender Technik (einschließlich unterstützender Software) noch Anforderungen an diese abdeckt, behandelt er den Einsatz von unterstützender Technik als integrierten Bestandteil von interaktiven Systemen.
Er ist dazu bestimmt, von Personen oder Organisationen angewendet zu werden, die Verantwortung für die Spezifikation, Gestaltung, Entwicklung, Bewertung und Beschaffung von Softwarebetriebssystemen und Softwareanwendungen tragen.

Ergonomie de l'interaction homme-système - Partie 171: Lignes directrices relatives à l'accessibilité aux logiciels (ISO 9241-171:2008)

L'ISO 9241-171:2008 fournit des lignes directrices relatives à l'ergonomie et des spécifications pour la conception de logiciels accessibles destinés à être utilisés au travail, à la maison, dans l'éducation et dans les lieux publics. Elle couvre les aspects liés à la conception de logiciels accessibles pour les personnes présentant le plus large éventail possible de capacités physiques, sensorielles et cognitives, y compris les personnes présentant des déficiences temporaires et les personnes âgées. Elle traite les aspects logiciels en matière d'accessibilité qui complètent la conception générale relative à l'utilisabilité couverte par l'ISO 9241-110, l'ISO 9241-11 à l'ISO 9241-17, l'ISO 14915 et l'ISO 13407.
L'ISO 9241-171:2008 est applicable à l'accessibilité des systèmes interactifs. Elle couvre une gamme étendue de logiciels (par exemple les logiciels de bureautique, le contenu Web, l'aide à l'apprentissage et les gestionnaires de documents).
Elle contribue à l'amélioration de l'utilisabilité des systèmes pour une plus grande diversité d'utilisateurs. Bien qu'elle ne couvre pas le comportement ou les exigences en matière de technologies d'assistance (y compris les logiciels d'assistance), elle traite de l'utilisation des technologies d'assistance en tant que composant intégré aux systèmes interactifs.
Elle est destinée aux responsables de la spécification, de la conception, du développement, de l'évaluation et de l'achat de systèmes d'exploitation de logiciels et d'applications logicielles.

Ergonomija medsebojnega vpliva človek-sistem - 171. del: Smernice za dostopnost programske opreme (ISO 9241-171:2008)

General Information

• Status: Published
• Publication Date: 14-Jul-2008
• Withdrawal Date: 30-Jan-2009
• ICS: 13.180 - Ergonomics
• Technical Committee: CEN/TC 122 - Ergonomics
• Drafting Committee: CEN/TC 122/WG 5 - Ergonomics of human-computer interaction
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Jul-2008
• Due Date: 15-Jul-2008
• Completion Date: 15-Jul-2008
• Ref Project: SIST EN ISO 9241-171:2009 - Ergonomics of human-system interaction - Part 171: Guidance on software accessibility (ISO 9241-171:2008)

Relations

• Revised: prEN ISO 9241-171 - Ergonomics of human-system interaction - Part 171: Guidance on software accessibility (ISO/DIS 9241-171:2025)
• Effective Date: 11-Jan-2023

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ergonomie der Mensch-System-Interaktion - Teil 171: Leitlinien für die Zugänglichkeit von Software (ISO 9241-171:2008)Ergonomie de l'interaction homme-systeme - Partie 171: Lignes directrices relatives a l'accessibilité aux logiciels (ISO 9241-171:2008)Ergonomics of human-system interaction - Part 171: Guidance on software accessibility (ISO 9241-171:2008)35.180Terminalska in druga periferna oprema ITIT Terminal and other peripheral equipment13.180ErgonomijaErgonomicsICS:Ta slovenski standard je istoveten z:EN ISO 9241-171:2008SIST EN ISO 9241-171:2009en,fr,de01-april-2009SIST EN ISO 9241-171:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 9241-171July 2008ICS 13.180 English VersionErgonomics of human-system interaction - Part 171: Guidanceon software accessibility (ISO 9241-171:2008)Ergonomie de l'interaction homme-système - Partie 171:Lignes directrices relatives à l'accessibilité aux logiciels(ISO 9241-171:2008)Ergonomie der Mensch-System-Interaktion - Teil 171:Leitlinien für die Zugänglichkeit von Software (ISO 9241-171:2008)This European Standard was approved by CEN on 28 June 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 9241-171:2008: ESIST EN ISO 9241-171:2009

Reference numberISO 9241-171:2008(E)© ISO 2008
INTERNATIONAL STANDARD ISO9241-171First edition2008-07-15Ergonomics of human-system interaction — Part 171: Guidance on software accessibility Ergonomie de l'interaction homme-système — Partie 171: Lignes directrices relatives à l'accessibilité aux logiciels
ISO 9241-171:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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.
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ii © ISO 2008 – All rights reserved
ISO 9241-171:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword.iv Introduction.vi 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Rationale and benefits of implementing accessibility.8 5 Principles for designing accessible software.8 6 Sources of variation in user characteristics.9 7 How to use this part of ISO 9241.10 7.1 General.10 7.2 Conformance.10 8 General guidelines and requirements.11 8.1 Names and labels for user-interface elements.11 8.2 User preference settings.14 8.3 Special considerations for accessibility adjustments.16 8.4 General control and operation guidelines.17 8.5 Compatibility with assistive technology.21 8.6 Closed systems.26 9 Inputs.26 9.1 Alternative input options.26 9.2 Keyboard focus.28 9.3 Keyboard input.29 9.4 Pointing devices.35 10 Outputs.39 10.1 General output guidelines.39 10.2 Visual output (displays).39 10.3 Text/fonts.40 10.4 Colour.41 10.5 Window appearance and behaviour.42 10.6 Audio output.45 10.7 Text equivalents of audio (captions).47 10.8 Media.47 10.9 Tactile output.48 11 On-line documentation, “Help” and support services.48 11.1 Documentation and “Help”.48 11.2 Support services.49 Annex A (informative)
Overview of the ISO 9241 series.51 Annex B (informative)
List of requirements.55 Annex C (informative)
Sample procedure for assessing applicability and conformance.57 Annex D (informative)
Activity limitation issues.68 Annex E (informative)
Access features.74 Annex F (informative)
Accessibility and usability.83 Bibliography.85 SIST EN ISO 9241-171:2009

ISO 9241-171:2008(E) iv © ISO 2008 – All rights reserved 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. 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 9241-171 was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 4, Ergonomics of human-system interaction. This first edition of ISO 9241-171 cancels and replaces ISO/TS 16071:2003, of which it constitutes a technical revision. ISO 9241 consists of the following parts, under the general title Ergonomic requirements for office work with visual display terminals (VDTs): ⎯ Part 1: General introduction ⎯ Part 2: Guidance on task requirements ⎯ Part 3: Visual display requirements ⎯ Part 4: Keyboard requirements ⎯ Part 5: Workstation layout and postural requirements ⎯ Part 6: Guidance on the work environment ⎯ Part 7: Requirements for display with reflections ⎯ Part 8: Requirements for displayed colours ⎯ Part 9: Requirements for non-keyboard input devices ⎯ Part 11: Guidance on usability ⎯ Part 12: Presentation of information ⎯ Part 13: User guidance ⎯ Part 14: Menu dialogues ⎯ Part 15: Command dialogues SIST EN ISO 9241-171:2009

ISO 9241-171:2008(E) © ISO 2008 – All rights reserved v⎯ Part 16: Direct manipulation dialogues ⎯ Part 17: Form filling dialogues Guidance on software individualization and human-centred design process for interactive systems are to form the subjects of future parts 129 and 210. ISO 9241 also consists of the following parts, under the
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