Advanced Level – Cross-Cutting
Summative Usability Evaluation – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
Usability evaluation used to assess how well the design objectives have been met, typically after implementation.
In simple words
Usability testing on the near-finished product to see if it hit the design goals.
Exam tip
Summative evaluations produce measurable KPIs: task completion %, time-on-task, satisfaction score.
Related terms
- Usability TestingWatch real users try the product to see if the UI actually works for them.
- Formative Usability EvaluationUsability testing done while the UI is being designed — feedback goes straight into the next iteration.
- Operational Acceptance Testing (OAT)Ops team checks that the system is deployable, monitorable and recoverable.
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