1、August 2009DEUTSCHE NORM English price group 19No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.180; 35.180!$YAD“154
2、3033www.din.deDDIN EN ISO 9241-20Ergonomics of human-system interaction Part 20: Accessibility guidelines for information/communicationtechnology (ICT) equipment and services (ISO 9241-20:2008)English version of DIN EN ISO 9241-20:2009-08Ergonomie der Mensch-System-Interaktion Teil 20: Leitlinien fr
3、 die Zugnglichkeit der Gerte und Dienste in der Informations- undKommunikationstechnologie (ISO 9241-20:2008)Englische Fassung DIN EN ISO 9241-20:2009-08www.beuth.deDocument comprises 50 pagesDIN EN ISO 9241-20:2009-08 2 National foreword This standard has been prepared by Technical Committee ISO/TC
4、 159 “Ergonomics”, Subcommittee SC 4 “Ergonomics of human-system interaction”, Working Group WG 6 “Human-centred design processes for interactive systems” in collaboration with Technical Committee CEN/TC 122 “Ergonomics” (Secretariat: DIN, Germany). The responsible German body involved in its prepar
5、ation was the Normenausschuss Ergonomie (Ergonomics Standards Committee), Joint Technical Committee NA 023-00-02 GA Gemeinschaftsarbeitsausschuss NAErg/NIA: Grundlagen zur barrierefreien Gestaltung/Accessibility. The DIN Standards corresponding to the International Standards referred to in this docu
6、ment are as follows: ISO 9241-5 DIN EN ISO 9241-5 ISO 9241-11 DIN EN ISO 9241-11 ISO 9241-12 DIN EN ISO 9241-12 ISO 9241-13 DIN EN ISO 9241-13 ISO 9241-14 DIN EN ISO 9241-14 ISO 9241-15 DIN EN ISO 9241-15 ISO 9241-16 DIN EN ISO 9241-16 ISO 9241-17 DIN EN ISO 9241-17 ISO 9241-110 DIN EN ISO 9241-110
7、ISO 9241-151 DIN EN ISO 9241-151 ISO 9241-171 DIN EN ISO 9241-171 ISO 9241-300 DIN EN ISO 9241-300 ISO 9241-302 DIN EN ISO 9241-302 ISO 9241-410 DIN EN ISO 9241-410 ISO 13407 DIN EN ISO 13407 ISO 14915 (all parts) DIN EN ISO 14915 National Annex NA (informative) Bibliography DIN EN ISO 9241-5, Ergon
8、omic requirements for office work with visual display terminals (VDTs) Part 5: Workstation layout and postural requirements DIN EN ISO 9241-11, Ergonomic requirements for office work with visual display terminals (VDTs) Part 11: Guidance on usability DIN EN ISO 9241-12, Ergonomic requirements for of
9、fice work with visual display terminals (VDTs) Part 12: Presentation of information DIN EN ISO 9241-13, Ergonomic requirements for office work with visual display terminals (VDTs) Part 13: User guidance DIN EN ISO 9241-20:2009-08 3 DIN EN ISO 9241-14, Ergonomic requirements for office work with visu
10、al display terminals (VDTs) Part 14: Menu dialogues DIN EN ISO 9241-15, Ergonomic requirements for office work with visual display terminals (VDTs) Part 15: Command dialogues DIN EN ISO 9241-16, Ergonomic requirements for office work with visual display terminals (VDTs) Part 16: Direct-manipulation
11、dialogues DIN EN ISO 9241-17, Ergonomic requirements for office work with visual display terminals (VDTs) Part 17: Form filling dialogues DIN EN ISO 9241-110, Ergonomics of human-system interaction Part 110: Dialogue principles DIN EN ISO 9241-151, Ergonomics of human-system interaction Part 151: Gu
12、idance on World Wide Web user interfaces DIN EN ISO 9241-171, Ergonomics of human-system interaction Part 171: Guidance on software accessibility DIN EN ISO 9241-300, Ergonomics of human-system interaction Part 300: Introduction to electronic visual display requirements DIN EN ISO 9241-302, Ergonomi
13、cs of human-system interaction Part 302: Terminology for electronic visual displays DIN EN ISO 9241-410, Ergonomics of human-system interaction Part 410: Design criteria for physical input devices DIN EN ISO 13407, Human-centred design processes for interactive systems DIN EN ISO 14915 (all parts),
14、Software ergonomics for multimedia user interfaces DIN EN ISO 9241-20:2009-08 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9241-20 January 2009 ICS 13.180; 35.180 English Version Ergonomics of human-system interaction - Part 20: Accessibility guidelines
15、 for information/communication technology (ICT) equipment and services (ISO 9241-20:2008) Ergonomie de linteraction homme-systme - Partie 20: Lignes directrices sur laccessibilit de lquipement et des services des technologies de linformation et de la communication (TIC) (ISO 9241-20:2008) Ergonomie
16、der Mensch-System-Interaktion - Teil 20: Leitlinien fr die Zugnglichkeit der Gerte und Dienste in der Informations- und Kommunikationstechnologie (ISO 9241-20:2008) This European Standard was approved by CEN on 29 December 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
17、ns 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 Management Centre or to any CEN member. This Euro
18、pean 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 Management Centre has the same status as the official versions. CEN members are the na
19、tional 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
20、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 924
21、1-20:2009: EContents Page 2 EN ISO 9241-20:2009 (E) DIN EN ISO 9241-20:2009-08 Foreword .3 Introduction.4 1 Scope5 2 Normative references5 3 Terms and definitions .6 4 Application .7 4.1 Principles .7 4.2 Application framework8 4.3 Implementing the recommendations.8 4.4 Conformance .9 5 Accessibilit
22、y.11 5.1 General .11 5.2 Context(s) of use and accessibility .11 5.3 Process.12 6 Recommendations related to managing development12 6.1 Information accessibility policy.12 6.2 Development accountability.12 7 Recommendations related to user characteristics12 7.1 General .12 7.2 Vision15 7.3 Hearing .
23、16 7.4 Speech18 7.5 Physical capabilities .18 7.6 Cognitive capabilities20 8 Recommendations related to task characteristics 21 8.1 Performing tasks based on context of use.21 8.2 Providing alternative ways of performing tasks 22 8.3 Performing maintenance and other non-task related operations 22 9
24、Recommendations related to equipment and service characteristics 22 9.1 General .22 9.2 Other standards for ICT equipment and services24 9.3 Assistive technologies24 9.4 Selection and operation of ICT equipment and services 25 9.5 Preparation and completion of operation.25 10 Recommendations related
25、 to environmental characteristics.26 10.1 Operating in a range of environments 26 10.2 Designing environments.26 10.3 Impacting the environment 27 Annex A (informative) Overview of the ISO 9241 series .28 Annex B (informative) Sample checklist for assessing applicability and conformance of ICT equip
26、ment and services32 Annex C (informative) User needs 37 Bibliography46 Foreword 3 DIN EN ISO 9241-20:2009-08 EN ISO 9241-20:2009 (E) The text of ISO 9241-20:2008 has been prepared by Technical Committee ISO/TC 159 “Ergonomics” of the International Organization for Standardization (ISO) and has been
27、taken over as EN ISO 9241-20:2009 by 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 July 2009, and conflictin
28、g national standards shall be withdrawn at the latest by July 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the C
29、EN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
30、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 9241-20:2008 has been approved by CEN as EN ISO 9241-20:2009 without any modification. Introduction The number of people using
31、 information/communication technologies (ICT) equipment and services, which combine hardware, software and network technologies, is increasing, as is the variety of ICT equipment and services. Our everyday lives are filled by such equipment and services. This part of ISO 9241 is intended to help dev
32、elopers enable ICT equipment and services (and forthcoming novel or innovative equipment and services) so that they can be used by the widest range of people, regardless of their capabilities or disabilities, limitations or culture. This part of ISO 9241 is based on the current understanding of the
33、characteristics of individuals who have particular physical, sensory and/or cognitive impairments. However, accessibility is an issue that affects many people. The users of interactive systems are consumers or professionals with roles such as home occupiers, school pupils, engineers, clerks, salespe
34、rsons and web designers. The individuals in such target groups vary significantly as regards physical, sensory and cognitive abilities and each target group will include people with different abilities. Thus people with disabilities do not form a specific group that can be separated out and then dis
35、regarded. The differences in capabilities may arise from a variety of factors that serve to limit the capability to engage in the activities of daily living, and are a “universal human experience”. Therefore, accessibility addresses a widely defined group of users including people with physical, sen
36、sory and cognitive impairments present at birth or acquired during life, elderly people (a growing percentage of the population), who can benefit from new products and services but who experience reduced physical, sensory and cognitive capacities, people with temporary disabilities, such as a person
37、 with a broken arm or someone without his or her reading glasses, and people who experience difficulties in particular situations, such as a person who works in a noisy environment or has both hands occupied by other activities. This part of ISO 9241 is prepared as guidance to secure and improve acc
38、essibility to ICT equipment, software and services when they are used by people within the widest range of capabilities. It presents: a) a framework based on the ergonomic concept of context of use, and b) principles for the accessibility of ICT equipment and services. Their presentation is intended
39、 to assist the users of this part of ISO 9241 in the consideration of accessibility issues. It also describes major product attributes with design examples, provides information for the planning, design and development of ICT equipment and services and acquisition and evaluation of ICT equipment and
40、 services. It recognizes the importance of following general ergonomic guidance as well as the more accessibility-specific guidance found in this and other accessibility-specific standards in achieving full use of ICT equipment, software and services. While many of the requirements and recommendatio
41、ns in this part of ISO 9241 also apply outside the domain of accessibility, they are especially important to this domain. The checklist of Annex B has also been included to help users examine the accessibility features of ICT equipment and services. 4 EN ISO 9241-20:2009 (E) DIN EN ISO 9241-20:2009-
42、08 1 Scope This part of ISO 9241 is intended for use by those responsible for planning, designing, developing, acquiring, and evaluating information/communication technology (ICT) equipment and services. It provides guidelines for improving the accessibility of ICT equipment and services such that t
43、hey will have wider accessibility for use at work, in the home, and in mobile and public environments. It covers issues associated with the design of equipment and services for people with a wide range of sensory, physical and cognitive abilities, including those who are temporarily disabled, and th
44、e elderly. A detailed design for particular equipment or a service can be developed based on its recommendations. If a specific detailed standard exists concerning the accessibility of equipment or services, then it can be used in conjunction with that more specific standard. Where such standards ar
45、e not available, this part of ISO 9241 can then form the basis for the design of the accessibility features of ICT equipment and services. It also provides general guidelines for acquiring and evaluating ICT equipment and services, including both hardware and software aspects of information processi
46、ng equipment, electronic communication facilities, office machines, and other similar technologies and services, used at work, in the home, and in mobile and public environments. In addition, it gives important information about context of use. Accessibility is increased by expanding the range of co
47、ntexts where equipment and services can be used. Context of use can result from the various components of the equipment or service, including user, task and equipment (hardware, software and materials) characteristics, as well as those of physical and social environments. Context of use can be consi
48、dered when planning, designing, developing, acquiring and evaluating ICT equipment and services. NOTE This part of ISO 9241 is a high-level standard applicable to all ICT equipment and services, therefore, detailed descriptions specific to equipment or services have been avoided. It can be referred
49、to for the prevention of barriers to trade or the movement of people in respect of each national, regional and international standardization activity in this area. More specific recommendations on software accessibility are contained in ISO 9241-171. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 924
