Criteria
Combined methods to define metrics reflecting UX quality and project goals.
HEART—UX metrics categories.
Happiness—user attitudes collected via survey.
Engagement—user involvement measured via behavioral proxies.
Adoption—the number of new users of a product/feature.
Retention—the rate of existing users’ return.
Task success—behavioral metrics of UX (efficiency, effectiveness, error rate).
Goals-Signals-Metrics—process transforming categories into metrics.
Goals—Identify the goals clearly.
Signals—Map goals to lower-level signals sensitive to changes in design.
Metrics—Refine signals into metrics to track or use in an A/B test.