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EN ISO 9241-20:2021

(Main)

Ergonomics of human-system interaction - Part 20: An ergonomic approach to accessibility within the ISO 9241 series (ISO 9241-20:2021)

Ergonomics of human-system interaction - Part 20: An ergonomic approach to accessibility within the ISO 9241 series (ISO 9241-20:2021)

This document provides:
a) an introduction to the importance of accessibility to human-system interaction;
b) a discussion of the relationship of principles within the ISO 9241 series and accessibility;
c) descriptions of activities related to the processes in ISO 9241-210 that focus on accessibility;
d) references to standards relevant to the accessibility of interactive systems.

Ergonomie der Mensch-System-Interaktion - Teil 20: Ein ergonomischer Ansatz für die Barrierefreiheit innerhalb der ISO 9241-Reihe (ISO 9241-20:2021)

Dieses Dokument enthält:
a)   eine Einführung in die Bedeutung von Barrierefreiheit für die Mensch-System-Interaktion,
b)   eine Diskussion des Zusammenhangs zwischen Grundsätzen der Normenreihe ISO 9241 und der Barrierefreiheit,
c)   Beschreibungen von Tätigkeiten im Zusammenhang mit den Prozessen in ISO 9241-210, die sich auf die Barrierefreiheit beziehen,
d)   Verweisungen auf Normen, die hinsichtlich der Barrierefreiheit von interaktiven Systemen relevant sind.

Ergonomie de l’interaction homme-système - Partie 20 : Approche ergonomique de l’accessibilité dans la série ISO 9241 (ISO 9241-20:2021)

Le présent document fournit:
a) une introduction à l’importance de l’accessibilité pour l’interaction homme-système;
b) une analyse de la relation entre les principes figurant dans la série ISO 9241 et l’accessibilité;
c) les descriptions des activités liées aux processus énoncés dans l’ISO 9241-210 qui se concentrent sur l’accessibilité;-
d) des références aux normes relatives à l’accessibilité des systèmes interactifs.

Ergonomija medsebojnega vpliva človek-sistem - 20. del: Ergonomski pristop k dostopnosti v skupini ISO 9241 (ISO 9241-20:2021)

Ta dokument zajema:
a) uvod v pomembnost dostopnosti medsebojnega vpliva človek-sistem;
b) razpravo o razmerju med načeli v skupini standardov ISO 9241 in dostopnostjo;
c) opise dejavnosti v povezavi s postopki iz standarda ISO 9241-210, ki se osredotočajo na dostopnost;
d) sklice na standarde, ki so pomembni za dostopnost interaktivnih sistemov.

General Information

Status
Published
Publication Date
07-Dec-2021
Withdrawal Date
29-Jun-2022
ICS
13.180 - Ergonomics
35.180 - IT Terminal and other peripheral equipment
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
08-Dec-2021
Completion Date
08-Dec-2021
Ref Project
SIST EN ISO 9241-20:2022 - Ergonomics of human-system interaction - Part 20: An ergonomic approach to accessibility within the ISO 9241 series (ISO 9241-20:2021)

Relations

Replaces
EN ISO 9241-20:2009 - Ergonomics of human-system interaction - Part 20: Accessibility guidelines for information/communication technology (ICT) equipment and services (ISO 9241-20:2008)
Effective Date
08-Jun-2022

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SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 9241-20:2009
Ergonomija medsebojnega vpliva človek-sistem - 20. del: Ergonomski pristop k
dostopnosti v skupini ISO 9241 (ISO 9241-20:2021)
Ergonomics of human-system interaction - Part 20: An ergonomic approach to
accessibility within the ISO 9241 series (ISO 9241-20:2021)
Ergonomie der Mensch-System-Interaktion - Teil 20: Ein ergonomischer Ansatz für die
Barrierefreiheit innerhalb der ISO 9241-Reihe (ISO 9241-20:2021)
Ergonomie de l’interaction homme-système - Partie 20 : Approche ergonomique de
l’accessibilité dans la série ISO 9241 (ISO 9241-20:2021)
Ta slovenski standard je istoveten z: EN ISO 9241-20:2021
ICS:
13.180 Ergonomija Ergonomics
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9241-20
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 13.180; 35.180 Supersedes EN ISO 9241-20:2009
English Version
Ergonomics of human-system interaction - Part 20: An
ergonomic approach to accessibility within the ISO 9241
series (ISO 9241-20:2021)
Ergonomie de l'interaction homme-système - Partie 20 Ergonomie der Mensch-System-Interaktion - Teil 20:
: Approche ergonomique de l'accessibilité dans la série Ein ergonomischer Ansatz für die Barrierefreiheit
ISO 9241 (ISO 9241-20:2021) innerhalb der ISO 9241-Reihe (ISO 9241-20:2021)
This European Standard was approved by CEN on 25 October 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9241-20:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9241-20:2021) has been prepared by Technical Committee ISO/TC 159
"Ergonomics" in collaboration with Technical Committee CEN/TC 122 “Ergonomics” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 9241-20:2009.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 9241-20:2021 has been approved by CEN as EN ISO 9241-20:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 9241-20
Second edition
2021-11
Ergonomics of human-system
interaction —
Part 20:
An ergonomic approach to
accessibility within the ISO 9241
series
Ergonomie de l’interaction homme-système —
Partie 20: Approche ergonomique de l’accessibilité dans la série ISO
Reference number
ISO 9241-20:2021(E)
ISO 9241-20:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 9241-20:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Accessibility and ergonomics of human-system interaction . 2
5 Ergonomic principles in the ISO 9241 series supporting accessibility .2
5.1 General . 2
5.2 Principles from ISO 9241-171 . 2
5.2.1 Suitability for the widest range of use . 2
5.2.2 Equitable use. 3
5.2.3 Robustness . . . 3
5.3 Principles from ISO 9241-110 . 3
5.3.1 Suitability for the user's tasks . 3
5.3.2 Self-descriptiveness . 4
5.3.3 C onformity with user expectations . 4
5.3.4 Learnability . 5
5.3.5 Controllability . 5
5.3.6 Use error robustness . 5
5.3.7 Approachability . 6
5.4 Additional specialized principles in the ISO 9241 series . 6
5.4.1 Principles from ISO 9241-112 . 6
5.4.2 Principles from ISO 9241-400. 7
5.4.3 Principles from ISO 9241-500 . 7
5.5 Principles of human-centred design from ISO 9241-210 . 8
6 Accessibility-focused design activities within projects . 8
6.1 General . 8
6.2 Activities and their inputs . 8
6.3 User input to activities . 10
6.4 Understand and identify the users and the context of use. 11
6.4.1 Scoping . 11
6.4.2 The importance of users . 11
6.4.3 User groups . 11
6.4.4 Requirements specification .12
6.5 Produce solutions to meet the user requirements .12
6.5.1 High-level approach .12
6.5.2 Developing the solution .13
6.5.3 Detailed design decisions . 13
6.5.4 E valuation as design progresses . 13
6.5.5 Iteration .13
6 . 6 E v a lu at ion . 13
6.6.1 E valuation from the earliest stages . 13
6.6.2 Focus on evaluation from the user's perspective . 14
6.6.3 Iteration and feedback . 14
6.6.4 C onformity assessment . 14
Annex A (informative) Major sources of international-level accessibility guidelines .15
Bibliography .
...

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This document provides requirements and recommendations for human-centred design principles and activities throughout the life cycle of computer-based interactive systems. It is intended to be used by those managing design processes, and is concerned with ways in which both hardware and software components of interactive systems can enhance human?system interaction.
NOTE      Computer-based interactive systems vary in scale and complexity. Examples include off-the-shelf (shrink-wrap) software products, custom office systems, process control systems, automated banking systems, Web sites and applications, and consumer products such as vending machines, mobile phones and digital television. Throughout this document, such systems are generally referred to as products, systems or services although, for simplicity, sometimes only one term is used.
This document provides an overview of human-centred design activities. It does not provide detailed coverage of the methods and techniques required for human-centred design, nor does it address health or safety aspects in detail. Although it addresses the planning and management of human-centred design, it does not address all aspects of project management.
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The scope of this document does not include other aspects of ergonomics, which include the design of organizations as well as systems for human use, and which extend beyond the domain of design; for example in the forensic analysis of the causes of accidents and in the generation of data and methods of measurement.
NOTE 1    ISO/TS 18152 is a related standard with a broader scope than this document. It includes the organizational processes for the identification and handling of issues related to both users and other stakeholders.
The intended application of this document is computer-based interactive systems. While the processes apply to interactive systems that deliver services, they do not cover the design of those services. The relevant aspects of the processes can also be applied to simple or non-computer?based interactive systems.
NOTE 2    Human-centred design concentrates on the human-centred aspects of design and not on other aspects of design such as mechanical construction, programming or the basic design of services.
The process descriptions in this document provide the basis for a rigorous assessment of an enterprise's capability to carry out human-centred processes in compliance with the ISO/IEC 33000 family of standards.
This document is intended for use by organizations that want to address and improve their treatment of human-centred design of either their internal systems or the products and services they provide, and the procurement of systems and parts of systems. The processes can be applied by small- and medium-sized enterprises as well as by large organizations.
Copyright release for the process descriptions
Users of this document may freely reproduce the process descriptions contained in Clause 9 as part of any process assessment model, or as part of any demonstration of compatibility with this document, so that it can be used for its intended purpose.

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