IS 16595 : Part 20 : 2024/ISO 9241-20 : 2021 Ergonomics of Human-System Interaction - Part 20 An Ergonomic Approach to Accessibility within the ISO 9241 Series

ICS 13.180

PGD 15

NATIONAL FOREWORD

This Indian Standard (Part 20) (First Revision) which is identical to ISO 9241-20 : 2021 'Ergonomics of human-system interaction - Part 20: An ergonomic approach to accessibility within the ISO 9241 series' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Ergonomics Sectional Committee and approval of the Production and General Engineering Division Council.

This standard was first published in 2018 based on ISO 9241-20 : 2008. This revision has been undertaken to align it with the latest version of ISO 9241-20.

This standard has been published in 12 parts. Other parts in this series are:

Part 5 Workstation layout and postural requirements

Part 11 Usability: Definitions and concepts (first revision)

Part 110 Interaction principles

Part 154 Interactive voice response (IVR) applications

Part 171 Guidance on software accessibility

Part 210 Human centered design for interactive systems

Part 300 Introduction to electronic visual display requirements

Part 302 Terminology for electronic visual displays

Part 410 Design criteria for physical input devices

Part 411 Evaluation method for the design of physical input devices

Part 971 Accessibility of tactile/haptic interactive systems

The major changes have been incorporated in this revision are as follows:

a) The guidance in the previous edition has been replaced by references to many different standards within the IS 16595/ISO 9241 series that now contain applicable guidance. The standard now references other standards relevant to the accessibility of interactive systems, such as IS 16595 (Part 171)/ISO 9241-171 and IS 16595(Part 971)/ISO 9241-971; and

b) The standard now provides an introduction to the importance of accessibility to human system interaction and a discussion of the relationship of principles within the IS 16595/ISO 9241 series and accessibility.

The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.