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| Criterion |  DevOps Blameless Postmortem |  Innovation Lean Startup |  Operations 8D Problem Solving |  Operations Root Cause Tree Analysis |
|---|---|---|---|---|
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. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 30-90 min | Wochen bis Monate je Lernzyklus | 1-6 Wochen | 1-3 h |
Participantsdifferent | 3-12 | 2-8 | 4-10 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | LeanStartupValidationMVP | QualityProblem solvingRoot cause | Root causeTreeIncidentQuality |