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| Criterion |  Innovation Lean Startup |  Product Discovery Problem Interview |  Product Discovery Concierge MVP |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | 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. | 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 idea can first fail or grow through genuine hands-on support, it relies on manual work instead of automation. It shows whether user value holds up even under manual execution. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | Wochen bis Monate je Lernzyklus | 30-60 min je Interview | 1-4 Wochen | 1-5 Tage |
Participantsdifferent | 2-8 | 5-12 Interviews | 3-10 Kunden | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Problem Evidence, Risk Notes, Customer Segments | Concierge Learnings, Service Blueprint, MVP Risks | Click Data, Interest Signal, Learning Decision |
Tags1 shared | LeanStartupValidationMVP | DiscoveryInterviewsValidation | MVPValidationServiceDiscovery | ValidationExperimentsDemandDiscovery |