ISO/IEC INTERNATIONAL STANDARD 29138-1 First edition 2018-11 Information technology - User interface accessibility - Part 1: User accessibility needs Technologies de I'information - Accessibilité de I'interface utilisateur Partie 1: Besoins d'accessibilite de I'usager Reference number IEC IS0/IEC 29138-1:2018(E) @IS0/IEC 2018 IS0/IEC 29138-1:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0/IEC 2018 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2018 - All rights reserved IS0/IEC 29138-1:2018(E) Contents Page Foreword ..vi Introduction. ..viii 1 Scope. 2 Normative references 3 Terms and definitions 4 Accessibility goals ..3 5 User accessibility needs and related information ..4 5.1 General 4 5.1.1 Needs .4 5.1.2 Some users need .5 5.2 The organization of this set of user accessibility needs .5 5.2.1 Organization based on accessibility goals .5 5.2.2 Heuristics for the organization of this set of user accessibility needs 5 5.3 Detailed information on needs. .6 5.3.1 The statement of the need .6 5.3.2 Need identifier .6 5.3.3 Description of the need ..6 5.3.4 Instancesoftheneed 7 5.3.5 Examples of the need .7 5.3.6 Examples of an instance 5.3.7 Short versions of the needs and their instances .7 5.4 Applying the needs 5.4.1 Users and uses of the set of needs 7 5.4.2 General activities involving user needs 7 5.4.3 Identifying system and context specific user needs. .8 5.4.4 Developing system requirements. ..8 5.4.5 Evaluating systems.. ..8 6 Details of the user accessibility needs .9 6.1 Details of the needs related to suitability for the widest range of users. 9 6.1.1 To recognize that they are included as a system user within diverse contexts. .9 6.1.2 To have accessible support for using the system 9 6.1.3 To have the system accessible to an individual with combinations of needs. .10 6.2 Details of the needs related to conformity with user expectations.. .10 6.2.1 To not be surprised by the results of interactions with the system. .10 6.2.2 To apply personal knowledge and experience to interact successfully with thesystem. 11 6.2.3 To receive instruction or training directed at preparing users for new knowledge needed to interact successfully with the system .11 6.2.4 To obtain immediate and easily accessible help or further instructions, where such help can be provided by the system. ..11 6.3 Details of the needs related to support for individualization .12 6.3.1 To be provided with (and to choose) the way of interacting with a system that best works for them (including activating and deactivating built-in accessibility features). ..12 6.3.2 To choose between the available input/output modalities and their configuration without requiring restart of the system ..12 6.3.3 To have simultaneous use of alternate interaction modalities .13 6.3.4 To be provided with information on available options for interacting with a system on which to base a choice of interaction methods ..13 6.3.5 To be provided an accessible means to choose individualization features. ..13 6.3.6 To have individualization features maintained for future uses of the system, until changed by the user.. ..14 IS0/IEC 2018 - All rights reserved ii IS0/IEC29138-1:2018(E) 6.3.7 To have the system use complete standardized sets of needs or preferencesfromspecificstandards 14 6.3.8 To take or give up control offunctions that could be performed by either the user or the system.. 15 6.3.9 To ha