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| Criterion |  Innovation How Might We |  Product Discovery Riskiest Assumption Test |  Product Discovery Fake Door Test |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | With a stuck problem carrying many implicit assumptions, the method translates observations into open, workable questions. It sharpens the problem frame without pre-thinking the solution, turning frustration or fuzziness into a search space with clear direction. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. | 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. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 30–45 min | 1-2 Wochen pro Iteration | 1-5 Tage | 45-60 min |
Participantsdifferent | 1-10 | 2-6 | Nutzertraffic | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | HMW Questions, Challenge Framing, Idea Prompts | Prioritized Assumption List, Test Plan, Results Report | Click Data, Interest Signal, Learning Decision | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | FramingOpportunityIdeationQuestions | ExperimentsValidationDiscoveryAssumptions | ValidationExperimentsDemandDiscovery | AssumptionsRiskExperimentsValidation |