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| Criterion |  UX Research User Interviews |  UX Design Lean UX Canvas |  Product Discovery Fake Door Test |  Product Discovery Test Card |
|---|---|---|---|---|
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. | The Lean UX Canvas helps clarify user behavior, touchpoints, and concept decisions. It makes assumptions and desired outcomes visible and captures the result as a completed canvas, hypothesis list, and first experiment. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Low | Medium | Medium | Low |
Timedifferent | 30–60 min per interview | 2-3 h | 1-5 Tage | 20-35 min |
Participantsdifferent | 1 participant per interview | 3-8 | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Completed Lean UX Canvas, Hypothesis list, First experiment | Click Data, Interest Signal, Learning Decision | Test Card with a pre-set threshold |
Tags1 shared | QualitativeResearchCustomerDiscovery | CanvasHypothesisOutcomesDiscovery | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryHypothesis |