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| Criterion |  Innovation Brainwriting |  Product Discovery Opportunity Interview |  Product Discovery Problem Interview |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | When loud voices or hierarchy distort the idea search, the method creates a quiet entry into joint development. It gives everyone thinking space and gathers contributions without social brakes, making diversity more visible and easier to build on. | When opportunities are still hidden behind signals of need, it structures conversations around needs and obstacles. It looks for patterns that lead to new product opportunities. | 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 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. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 15-30 min | 30-60 min je Interview | 30-60 min je Interview | 1-5 Tage |
Participantsdifferent | 3-12 | 5-12 Interviews | 5-12 Interviews | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Idea sheets, Expanded concepts, Prioritized list | Interview Notes, Opportunity Themes, Customer Quotes | Problem Evidence, Risk Notes, Customer Segments | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | BrainstormingCollaborationInclusionIdeas | DiscoveryInterviewsOpportunityCustomer | DiscoveryInterviewsValidation | ValidationExperimentsDemandDiscovery |