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Selected:After-Action ReviewRoot Cause AnalysisBlameless PostmortemFailure Mode and Effects Analysis
| Criterion |  Operations After-Action Review |  Operations Root Cause Analysis |  DevOps Blameless Postmortem |  Operations Failure Mode and Effects 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. | 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. | 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Low | Medium | Medium | High |
Timedifferent | 20-45 min | 1-4 h | 30-90 min | 2-6 h |
Participantsdifferent | 3-12 | 3-8 | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Postmortem Doc, Action Items, Timeline | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | LearningOperationsImprovement | Root causeProblem solvingQualityIncident | Site Reliability EngineeringIncidentLearningReliability | RiskQualityOperationsRoot cause |