Extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use.
(“Ergonomics of human-system interaction — Part 11: Usability: Definitions and concepts”) replaces the earlier 1998 version. It provides an updated, internationally standardized framework for defining and understanding usability in system, product, or service design. The standard shifts from a narrow “ease of use” perspective to a broader, context-dependent definition that emphasizes outcomes of use (effectiveness, efficiency, satisfaction) within specific contexts of use . iso 9241-11 usability definition 2018
Perhaps the most forward-thinking aspect of the review is how it positions usability in relation to User Experience. For a long time, there was a debate: Is UX just a fancy word for usability? Extent to which a system, product or service
It aligns usability with the concept of "universal design," stating that a system cannot be considered highly usable if it excludes a significant portion of the population due to disability or impairment. The standard shifts from a narrow “ease of