ISO 9241-20:2021
Ergonomics of human-system interaction — Part 20: An ergonomic approach to accessibility within the ISO 9241 series
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.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Accessibility and ergonomics of human-system interaction
5 Ergonomic principles in the ISO 9241 series supporting accessibility
5.1 General
5.2 Principles from ISO 9241-171
5.2.1 Suitability for the widest range of use
5.2.2 Equitable use
5.2.3 Robustness
5.3 Principles from ISO 9241-110
5.3.1 Suitability for the user's tasks
5.3.2 Self-descriptiveness
5.3.3 Conformity with user expectations
5.3.4 Learnability
5.3.5 Controllability
5.3.6 Use error robustness
5.3.7 Approachability
5.4 Additional specialized principles in the ISO 9241 series
5.4.1 Principles from ISO 9241-112
5.4.2 Principles from ISO 9241-400
5.4.3 Principles from ISO 9241-500
5.5 Principles of human-centred design from ISO 9241-210
6 Accessibility-focused design activities within projects
6.1 General
6.2 Activities and their inputs
6.3 User input to activities
6.4 Understand and identify the users and the context of use
6.4.1 Scoping
6.4.2 The importance of users
6.4.3 User groups
6.4.4 Requirements specification
6.5 Produce solutions to meet the user requirements
6.5.1 High-level approach
6.5.2 Developing the solution
6.5.3 Detailed design decisions
6.5.4 Evaluation as design progresses
6.5.5 Iteration
6.6 Evaluation
6.6.1 Evaluation from the earliest stages
6.6.2 Focus on evaluation from the user's perspective
6.6.3 Iteration and feedback
6.6.4 Conformity assessment
Annex A (informative) Major sources of international-level accessibility guidelines
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Accessibility and ergonomics of human-system interaction
5 Ergonomic principles in the ISO 9241 series supporting accessibility
5.1 General
5.2 Principles from ISO 9241-171
5.2.1 Suitability for the widest range of use
5.2.2 Equitable use
5.2.3 Robustness
5.3 Principles from ISO 9241-110
5.3.1 Suitability for the user's tasks
5.3.2 Self-descriptiveness
5.3.3 Conformity with user expectations
5.3.4 Learnability
5.3.5 Controllability
5.3.6 Use error robustness
5.3.7 Approachability
5.4 Additional specialized principles in the ISO 9241 series
5.4.1 Principles from ISO 9241-112
5.4.2 Principles from ISO 9241-400
5.4.3 Principles from ISO 9241-500
5.5 Principles of human-centred design from ISO 9241-210
6 Accessibility-focused design activities within projects
6.1 General
6.2 Activities and their inputs
6.3 User input to activities
6.4 Understand and identify the users and the context of use
6.4.1 Scoping
6.4.2 The importance of users
6.4.3 User groups
6.4.4 Requirements specification
6.5 Produce solutions to meet the user requirements
6.5.1 High-level approach
6.5.2 Developing the solution
6.5.3 Detailed design decisions
6.5.4 Evaluation as design progresses
6.5.5 Iteration
6.6 Evaluation
6.6.1 Evaluation from the earliest stages
6.6.2 Focus on evaluation from the user's perspective
6.6.3 Iteration and feedback
6.6.4 Conformity assessment
Annex A (informative) Major sources of international-level accessibility guidelines
Bibliography