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| Criterion |  Innovation Double Diamond |  Product Strategy GIST Planning |  Product Discovery Opportunity Solution Tree |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement. | GIST Planning helps clarify target groups, value, goals, and priorities. It links customer value, product logic, and decision priorities, and captures the result as goals, an idea bank, and a step-project list. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | Wochen bis Monate | Wochen bis Monate je Goal | 1-2 h Setup, laufend | 1-5 Tage |
Participantsdifferent | 3-12 | 3-10 | 2-6 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Goals, Idea bank, Step-project list, Tasks, Learning reports | Opportunity Solution Tree, Experiment Backlog, Learning Log | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ProcessDivergenceInnovation | RoadmapOutcomesPlanningExperiments | DiscoveryOutcomesExperimentsOpportunity | ValidationExperimentsDemandDiscovery |