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| Criterion |  DevOps Blameless Postmortem |  Operations After-Action Review |  Systems Thinking CATWOE Analysis |  DevOps Game Day |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | CATWOE structures a problem from six viewpoints and prevents too narrow a view of the situation. Different experiences of the system become comparably discussable this way. | 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 | Medium | Low | Medium | High |
Timedifferent | 30-90 min | 20-45 min | 45-90 min | Halber Tag |
Participantsdifferent | 3-12 | 3-12 | 3-8 | 5-20 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Lessons learned, Action items, Event summary | CATWOE Canvas, Root Definition, Stakeholder Perspectives, Constraints | Simulation Notes, Gaps List, Updated Runbooks |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | LearningOperationsImprovement | Systems thinkingFramingStakeholders | ResilienceOperationsIncident |