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| Criterion |  Product Discovery Product Kata |  Innovation Brainwriting |  Product Discovery Opportunity Solution Tree |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | Product Kata helps clarify customer problems, solution ideas, and evidence through a repeatable improvement routine. It captures direction, current metric, target metric, experiment notes, and learning. | 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 discovery keeps swinging between goals, ideas, and learning loops, it creates clear steering logic. It connects the desired outcome, opportunities, and experiments into a legible structure. | 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 | Medium | Low | Medium | Medium |
Timedifferent | 1-2 Wochen je Loop | 15-30 min | 1-2 h Setup, laufend | 1-5 Tage |
Participantsdifferent | 3-10 | 3-12 | 2-6 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Direction, Current metric, Target metric, Experiment note, Learning report | Idea sheets, Expanded concepts, Prioritized list | Opportunity Solution Tree, Experiment Backlog, Learning Log | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | OutcomesDiscoveryLearningIterationCoaching | BrainstormingCollaborationInclusionIdeas | DiscoveryOutcomesExperimentsOpportunity | ValidationExperimentsDemandDiscovery |