Metrics

List of usability metrics to measure and evaluate the quality of both specific user interfaces and the whole system.

Primary metrics

• Task completion time
• Amount of errors done during task completion
• Amount of actions to perform basic positive scenarios
• Task completion success rate
• Learning curve measurement
• Subjective satisfaction

Secondary metrics

• System startup time
• Results awaiting time
• Rate of distractions
• Recognition time & error rate
• Guidelines following rate