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| Criterion |  DevOps Blameless Postmortem |  Innovation Lean Startup |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | For uncertain business assumptions, the method forces the idea into contact with real market reactions early. It separates wishful picture, assumption, and observable behavior, so that learning becomes faster than planning. This translates uncertainty into measurable insight. | 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 | Medium | Medium | Medium | Low |
Timedifferent | 30-90 min | Wochen bis Monate je Lernzyklus | 1-5 Tage | 25-40 min |
Participantsdifferent | 3-12 | 2-8 | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | LeanStartupValidationMVP | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |