Usability Metrics
UX метрики
This document provides metrics for measuring the usability of a product, including effectiveness, efficiency, satisfaction, and overall usability, with specific metrics for different user scenarios and tasks.
LinkUsability has an international standard definition in ISO 9241 pt. 11 (ISO, 1998), which defined usability as the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use.
Jeff Sauro • Quantifying the User Experience: Practical Statistics for User Research
For practical tips on collecting metrics in usability tests, see A Practical Guide to Measuring Usability (Sauro, 2010) and Measuring the User Experience (Tullis and Albert, 2008).
Jeff Sauro • Quantifying the User Experience: Practical Statistics for User Research
Completion rates, also called success rates, are the most fundamental of usability metrics (Nielsen, 2001). They are typically collected as a binary measure of task success (coded as 1) or task failure (coded as 0). You report completion rates on a task by dividing the number of users who successfully complete the task by the total number who attem
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