Iso 9241-11 Usability Definition 2018 File

One of the most significant changes in the 2018 definition is the broadening of scope. Previously, usability was often viewed as a property of the product itself (e.g., "this software is usable"). ISO 9241-11:2018 redefines usability as an outcome of the between a user and a system.

: The resources (such as time, physical effort, or mental load) expended in relation to the accuracy and completeness of the goals achieved. It asks: How much effort was required to finish the task? iso 9241-11 usability definition 2018