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Usability Test
In-Person Moderated Usability Testing
A facilitator watches external participants attempt predefined tasks with a product, service, or prototype, often asking them to think aloud, and may ask follow-up questions to probe observed behavior. Sessions are typically planned, executed, and analyzed using a standardized process to identify usability issues.
When This Method Fits
Typical duration
Days – Weeks
Typical cost
Medium
Fidelity level
Mockup, Live Full
Stage
Validation
Hypothesis type
Execution
Goal type
Find product-market fit, Deepen product-market fit, Drive corporate innovation / R&D
Randomization
N/A
Study design
Individual case report
Minimum units needed
5
1Best Fit When
Best when you need rich, moderator-probed insight into exactly why and where users struggle with a product, not just whether they succeed.