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| Criterion |  Knowledge Modeling Feynman Technique |  Operations ALPEN Method |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | The Feynman Technique checks understanding by explaining a topic so that it stays easy for others to understand. It makes knowledge gaps visible before they become costly in everyday work. | With an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. | 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 | Low | Low | Low | Medium |
Timedifferent | 20-60 min | 10-20 min daily | 20-35 min | 1-5 Tage |
Participantsdifferent | 1 | 1 | 1-5 | Nutzertraffic |
Formatdifferent | Async | Async | Workshop + async | Async |
Outputdifferent | Plain-language Explanation, Knowledge Gaps, Study Notes | Daily Plan, Time Estimates, Review Notes | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | LearningKnowledgeUnderstanding | PlanningTime managementProductivityOperations | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |