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| Criterion |  Innovation TRIZ |  Innovation Design Thinking |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | For technical contradictions or trade-offs, the method looks for solutions that resolve opposing requirements at the same time. It translates limits into an explicit picture of conflict that becomes workable. This produces not just compromises but more elegant principles. | For complex user problems with an uncertain cause, the method connects observation, interpretation, and experiment into a learning cycle. It keeps the focus on real needs and avoids premature solution language. This produces robust decisions for product and service. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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 | High | High | Low | Medium |
Timedifferent | 1-4 h | 1 Tag bis mehrere Wochen | 20-35 min | 1-5 Tage |
Participantsdifferent | 2-8 | 4-10 | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Async |
Outputdifferent | Contradiction Statement, Inventive Principles, Solution Concepts | Problem Statement, Prototype, Test Learnings | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | InnovationProblem solvingContradictionsCreativity | InnovationPrototypeResearch | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |