UX Reference · Topic
Usability metrics and measurement
Usability metrics describe aspects of task performance and experience. These entries explain measures, interpretation and the context needed to compare results.
31 entries
A/B TestingA/B testing is a controlled experimental method in which users are assigned to different variants so researchers or product teams can…Also: Split testing, online controlled experiment, randomized experiment
ActivationActivation is the point at which a user reaches an early meaningful value, readiness state, or capability that indicates they can begin…Also: User activation, activation event, first value point
AdoptionAdoption is the meaningful uptake and use of a product, service, system, or practice by intended users in a real context.Also: Service uptake, product adoption, technology adoption
Behavioral AnalyticsBehavioral analytics is the collection and analysis of user interaction data to understand how people move through, use, abandon, repeat…Also: Product analytics, interaction analytics, user behavior analytics
Benchmark TaskA benchmark task is a repeatable task used to measure usability or experience performance consistently across designs, releases, products…Also: Standardized task, benchmark scenario, repeatable usability task
ConversionConversion is the completion of a meaningful intended action within a product, service, or journey, interpreted in relation to user need…Also: Conversion event, goal completion, key event
Data QualityData quality is the degree to which data is accurate, complete, consistent, timely, valid, and fit for its intended use.Also: Information quality, data fitness, record quality
Drop-Off RateDrop-off rate is the proportion of users who leave or stop progressing at a defined step in a journey, flow, funnel, or task sequence.Also: Abandonment rate, step exit rate, funnel drop-off
EffectivenessEffectiveness is the extent to which users achieve specified goals with accuracy and completeness in a defined context of use.Also: Goal achievement, task effectiveness, completion quality
EfficiencyEfficiency is the extent to which users achieve specified goals while expending appropriate resources such as time, effort, attention…Also: Task efficiency, interaction efficiency, effort efficiency
EngagementEngagement is the degree and quality of meaningful interaction users have with a product, service, system, or content in relation to a…Also: User engagement, service engagement, interaction engagement
Error RateError rate records how often users make defined errors while attempting a task or journey under evaluation conditions.Also: Mistake rate, user errors, task errors
Funnel AnalysisFunnel analysis is a method for examining how users progress through a defined sequence of steps toward a task or service outcome.Also: Conversion funnel analysis, journey funnel analysis, step analysis
Impact MetricAn impact metric measures a broader or longer-term effect associated with a service, programme, product, or intervention, often beyond…Also: Impact indicator, long-term outcome measure, programme impact measure
Interaction CostInteraction cost is the effort a user must expend to complete a task or obtain value from a system, including physical, cognitive…Also: Interaction effort, user effort, task effort
Lagging IndicatorA lagging indicator is a measure that shows a result after an activity, service period, intervention, or outcome has already occurred.Also: Retrospective indicator, outcome indicator, historical performance measure
Leading IndicatorA leading indicator is an early signal that may help predict, influence, or warn about a later outcome before that outcome is fully visible.Also: Early indicator, predictive indicator, upstream indicator
LearnabilityLearnability is the extent to which users can begin using a system, develop understanding, and improve performance with experience.Also: Ease of learning, initial learnability, extended learnability
Outcome MetricAn outcome metric measures a meaningful result, change, or effect that occurs because users, staff, or organizations interact with a…Also: Result metric, outcome indicator, service outcome measure
Post-Task RatingA post-task rating is a subjective measure collected immediately after a user attempts a task to capture perceived ease, difficulty…Also: After-task rating, task-level rating, post-scenario rating
RetentionRetention is the continued appropriate use of a product, service, system, or relationship over time when repeated use is expected or…Also: User retention, service retention, continued use
Severity RatingA severity rating is an assessment of how serious a usability issue is based on its effect on users, tasks, frequency, recoverability, and…Also: Issue severity, usability severity, problem priority rating
Single Ease QuestionThe Single Ease Question is a one-item post-task rating that asks users how easy or difficult a task was to complete.Also: SEQ, task ease rating, post-task ease question
Success CriteriaSuccess criteria are the defined conditions that determine whether a task, interaction, service journey, or evaluation goal has been…Also: Completion criteria, task success rules, acceptance criteria
System Usability ScaleThe System Usability Scale is a standardized questionnaire used to measure perceived usability after people use a system.Also: SUS, usability scale, perceived usability questionnaire
Task SuccessTask success is a UX evaluation measure that describes whether a user completes a specified task or goal under defined evaluation…Also: Task completion, completion rate, success rate
Time on TaskTime on task records the elapsed time users take to complete a defined task under evaluation conditions.Also: Task time, completion time, task duration
Usability BenchmarkingUsability benchmarking is the process of measuring usability performance using repeatable tasks and metrics so results can be compared…Also: UX benchmarking, usability performance benchmarking, experience benchmarking
User ConfidenceUser confidence is a perception-based measure of how certain users feel about their understanding, decision, or task outcome after…Also: Task confidence, decision confidence, completion confidence
User SatisfactionUser satisfaction captures users' reported judgment, comfort, confidence, or sentiment about an interaction, product, or service experience.Also: Satisfaction, user sentiment, perceived ease
UX MetricA UX metric is a defined measure used to evaluate an aspect of user experience, usability, interaction quality, perception, behavior, or…Also: Usability metric, experience measure, UX measure