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| Criterion |  Product Discovery Smoke Test |  Operations Change Analysis |  Operations 5 Whys |  Product Discovery Fake Door Test |
|---|---|---|---|---|
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 a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Medium | Low | Medium |
Timedifferent | 1-5 Tage | 45-120 min | 15-30 min | 1-5 Tage |
Participantsdifferent | Nutzertraffic | 2-6 | 2-6 | Nutzertraffic |
Formatdifferent | Async | Workshop + async | Workshop | Async |
Outputdifferent | Interest Metrics, Conversion Signal, Learning Note | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Root cause notes, Countermeasures | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ValidationExperimentsDemandGrowth | ChangeRoot causeTroubleshootingComparison | Root causeIncidentLeanProblem solving | ValidationExperimentsDemandDiscovery |