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| Criterion |  DevOps ChatOps |  DevOps Blameless Postmortem |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | For operational work in a distributed team, the method links communication with direct system control. It records decisions right where the signal, the context, and the execution come together. | 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. | 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 | Medium | Medium | Low | Medium |
Timedifferent | Ongoing | 30-90 min | 20-35 min | 1-5 Tage |
Participantsdifferent | 2-20 | 3-12 | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Chat Transcript, Action Log, Automations | Postmortem Doc, Action Items, Timeline | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | CollaborationEngineeringIncident | Site Reliability EngineeringIncidentLearningReliability | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |