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| Criterion |  UX Research User Interviews |  Agile Start Stop Continue |  Agile Starfish Retrospective |  Product Discovery Experiment Canvas |
|---|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | When a team wants to deliberately adjust its working behavior, it makes habits visible and assessable. It focuses on concrete changes instead of diffuse mood. | When improvement options need to be sorted more finely than just start and stop, it brings observations into clear kinds of action. This makes visible what should be done more, less, newly, or continued. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. |
Complexitysame | Low | Low | Low | Low |
Timedifferent | 30–60 min per interview | 30-60 min | 45-90 min | 30-60 min |
Participantsdifferent | 1 participant per interview | 3-12 | 4-12 | 1-5 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Start Stop Continue Board, Improvement Actions | Starfish Board, Practice Changes, Experiments | Completed Experiment Canvas, Success Metric |
Tagsno overlap | QualitativeResearchCustomerDiscovery | RetrospectiveImprovementTeamReflection | RetrospectiveImprovementExperimentsTeam | ExperimentsValidationDiscoveryHypothesis |