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| Criterion |  DevOps Blameless Postmortem |  Operations 5 Whys |  Growth A/B Testing |
|---|---|---|---|
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 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 two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. |
Complexitydifferent | Medium | Low | High |
Timedifferent | 30-90 min | 15-30 min | 1-4 Wochen |
Participantsdifferent | 3-12 | 2-6 | 1-6 |
Formatdifferent | Workshop + async | Workshop | Async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Root cause notes, Countermeasures | Experiment results, Decision log, Learning summary |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | Root causeIncidentLeanProblem solving | ExperimentsGrowthAnalyticsValidation |
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