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| Criterion |  Operations After-Action Review |  Operations ABC Analysis |  DevOps Blameless Postmortem |  DevOps Game Day |
|---|---|---|---|---|
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. | 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. |
Complexitydifferent | Low | Low | Medium | High |
Timedifferent | 20-45 min | 30-60 min | 30-90 min | Halber Tag |
Participantsdifferent | 3-12 | 1-5 | 3-12 | 5-20 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | ABC Classification, Focus Rules, Control List | Postmortem Doc, Action Items, Timeline | Simulation Notes, Gaps List, Updated Runbooks |
Tagsno overlap | LearningOperationsImprovement | PrioritizationOperationsPortfolio | Site Reliability EngineeringIncidentLearningReliability | ResilienceOperationsIncident |