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
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