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| Criterion |  Product Discovery Problem Interview |  Product Strategy Lean Canvas |  Product Discovery Fake Door Test |  Innovation Lean Startup |
|---|---|---|---|---|
Purposedifferent | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. | When an early product bet still has too many open points, it brings target group, problem, and assumptions into a single view. It condenses the idea so core risks become nameable. | 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. | For uncertain business assumptions, the method forces the idea into contact with real market reactions early. It separates wishful picture, assumption, and observable behavior, so that learning becomes faster than planning. This translates uncertainty into measurable insight. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 30-60 min je Interview | 45-90 min | 1-5 Tage | Wochen bis Monate je Lernzyklus |
Participantsdifferent | 5-12 Interviews | 1-6 | Nutzertraffic | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Lean Canvas, Core Assumptions, Experiment Backlog | Click Data, Interest Signal, Learning Decision | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision |
Tagsno overlap | DiscoveryInterviewsValidation | StartupLeanAssumptionsBusiness model | ValidationExperimentsDemandDiscovery | LeanStartupValidationMVP |