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| Criterion |  Operations After-Action Review |  Operations 8D Problem Solving |  DevOps Blameless Postmortem |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Low | High | Medium | Medium |
Timedifferent | 20-45 min | 1-6 Wochen | 30-90 min | 1-4 h |
Participantsdifferent | 3-12 | 4-10 | 3-12 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Postmortem Doc, Action Items, Timeline | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | LearningOperationsImprovement | QualityProblem solvingRoot cause | Site Reliability EngineeringIncidentLearningReliability | Root causeProblem solvingQualityIncident |