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| Criterion |  Operations After-Action Review |  Operations ABC Analysis |  DevOps Blameless Postmortem |  DevOps Incident Timeline 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. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | 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 an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 20-45 min | 30-60 min | 30-90 min | 60-180 min |
Participantsdifferent | 3-12 | 1-5 | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | ABC Classification, Focus Rules, Control List | Postmortem Doc, Action Items, Timeline | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions |
Tagsno overlap | LearningOperationsImprovement | PrioritizationOperationsPortfolio | Site Reliability EngineeringIncidentLearningReliability | IncidentTimelineSite Reliability Engineering |