ISO 9241-11:2018
Ergonomics of human-system interaction — Part 11: Usability: Definitions and concepts
ISO 9241-11:2018 provides a framework for understanding the concept of usability and applying it to situations where people use interactive systems, and other types of systems (including built environments), and products (including industrial and consumer products) and services (including technical and personal services).
NOTE In this document, the phrase "object of interest" refers to the system, product or service for which usability is being considered (see 8.1).
ISO 9241-11:2018:
- explains that usability is an outcome of use;
- defines key terms and concepts;
- identifies the fundamentals of usability; and
- explains the application of the concept of usability.
ISO 9241-11:2018 does not describe specific processes or methods for taking account of usability in design development or evaluation.
The intended users of this document include:
- usability/ergonomics/human factors professionals;
- designers and developers of systems, products and services;
- quality assurance personnel;
- public and corporate purchasers; and
- consumer organizations.
The most common applications of this document are in design and evaluation.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Rationale and benefits of usability
5 Usability in a context of use
5.1 Concept of usability
5.2 System, product or service
5.3 Consideration of usability for “specified” circumstances
5.3.1 General
5.3.2 Specified users
5.3.3 Specified goals
5.3.4 Specified contexts of use
6 Outcomes of use
6.1 Usability as an outcome
6.2 Effectiveness
6.2.1 General
6.2.2 Accuracy
6.2.3 Completeness
6.3 Efficiency
6.3.1 General
6.3.2 Time used
6.3.3 Human effort expended
6.3.4 Financial resources expended
6.3.5 Materials expended
6.4 Satisfaction
6.4.1 General
6.4.2 Physical responses
6.4.3 Cognitive responses
6.4.4 Emotional responses
6.5 Specific uses of the concept of usability
6.6 Other outcomes of use
6.6.1 General
6.6.2 Accessibility
6.6.3 User experience
6.6.4 Avoidance of harm from use
7 Context of use
7.1 Components of the context of use
7.2 Users within the context of use
7.3 Goals within the context of use
7.4 Tasks within the context of use
7.5 Resources
7.5.1 General
7.5.2 Reusable resources
7.5.3 Expendable resources
7.6 Environment
7.6.1 General
7.6.2 Technical environment
7.6.3 Physical environment
7.6.4 Social, cultural and organizational environment
8 Applying the concept of usability
8.1 Usability that results from use of various objects of interest
8.2 Characteristics of users, tasks and environments needed for usability
8.3 Achieving usability in design and development
8.4 Usability in procurement
8.5 Usability in a review or when making a comparison
8.6 Usability inputs to marketing and market research
Annex A (informative) Relationship of usability to other concepts
Annex B (informative) Usability measurement
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Rationale and benefits of usability
5 Usability in a context of use
5.1 Concept of usability
5.2 System, product or service
5.3 Consideration of usability for “specified” circumstances
5.3.1 General
5.3.2 Specified users
5.3.3 Specified goals
5.3.4 Specified contexts of use
6 Outcomes of use
6.1 Usability as an outcome
6.2 Effectiveness
6.2.1 General
6.2.2 Accuracy
6.2.3 Completeness
6.3 Efficiency
6.3.1 General
6.3.2 Time used
6.3.3 Human effort expended
6.3.4 Financial resources expended
6.3.5 Materials expended
6.4 Satisfaction
6.4.1 General
6.4.2 Physical responses
6.4.3 Cognitive responses
6.4.4 Emotional responses
6.5 Specific uses of the concept of usability
6.6 Other outcomes of use
6.6.1 General
6.6.2 Accessibility
6.6.3 User experience
6.6.4 Avoidance of harm from use
7 Context of use
7.1 Components of the context of use
7.2 Users within the context of use
7.3 Goals within the context of use
7.4 Tasks within the context of use
7.5 Resources
7.5.1 General
7.5.2 Reusable resources
7.5.3 Expendable resources
7.6 Environment
7.6.1 General
7.6.2 Technical environment
7.6.3 Physical environment
7.6.4 Social, cultural and organizational environment
8 Applying the concept of usability
8.1 Usability that results from use of various objects of interest
8.2 Characteristics of users, tasks and environments needed for usability
8.3 Achieving usability in design and development
8.4 Usability in procurement
8.5 Usability in a review or when making a comparison
8.6 Usability inputs to marketing and market research
Annex A (informative) Relationship of usability to other concepts
Annex B (informative) Usability measurement
Bibliography