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| Criterion |  Systems Thinking Future Reality Tree |  Product Discovery Smoke Test |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | When demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | High | Low | Medium | Low |
Timedifferent | 2-4 h | 1-5 Tage | 1-5 Tage | 25-40 min |
Participantsdifferent | 3-8 | Nutzertraffic | Nutzertraffic | 1-5 |
Formatdifferent | Workshop | Async | Async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Interest Metrics, Conversion Signal, Learning Note | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | ValidationExperimentsDemandGrowth | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |