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Selected:After-Action ReviewFailure Mode and Effects AnalysisBlameless PostmortemRoot Cause Analysis
| Criterion |  Operations After-Action Review |  Operations Failure Mode and Effects Analysis |  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 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. | 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 | 2-6 h | 30-90 min | 1-4 h |
Participantsdifferent | 3-12 | 3-10 | 3-12 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | FMEA Table, Risk Priority, Mitigation Actions | Postmortem Doc, Action Items, Timeline | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | LearningOperationsImprovement | RiskQualityOperationsRoot cause | Site Reliability EngineeringIncidentLearningReliability | Root causeProblem solvingQualityIncident |