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| Criterion |  Operations After-Action Review |  DevOps Blameless Postmortem |  DevOps Game Day |  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. | 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. | In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic. | 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 | Medium | High | Medium |
Timedifferent | 20-45 min | 30-90 min | Halber Tag | 60-180 min |
Participantsdifferent | 3-12 | 3-12 | 5-20 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Postmortem Doc, Action Items, Timeline | Simulation Notes, Gaps List, Updated Runbooks | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions |
Tagsno overlap | LearningOperationsImprovement | Site Reliability EngineeringIncidentLearningReliability | ResilienceOperationsIncident | IncidentTimelineSite Reliability Engineering |