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| Criterion |  Product Discovery Smoke Test |  Operations Causal Factor Analysis |  Product Discovery Fake Door Test |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | 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. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | 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 several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. |
Complexitydifferent | Low | High | Medium | Medium |
Timedifferent | 1-5 Tage | 2-6 h | 1-5 Tage | 45-75 min |
Participantsdifferent | Nutzertraffic | 3-10 | Nutzertraffic | 2-8 |
Formatdifferent | Async | Workshop + async | Async | Workshop |
Outputdifferent | Interest Metrics, Conversion Signal, Learning Note | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Click Data, Interest Signal, Learning Decision | Test Matrix, Test Plan |
Tagsno overlap | ValidationExperimentsDemandGrowth | CausalityIncidentRoot causeTimeline | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryOptions |