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| Criterion |  Operations After-Action Review |  Operations Learning Review |  Systems Thinking CATWOE Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|---|
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 a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. | 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. | 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. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 20-45 min | 1-3 h | 45-90 min | 30-90 min |
Participantsdifferent | 3-12 | 3-10 | 3-8 | 3-12 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Learning Review Notes, System Factors, Improvement Actions | CATWOE Canvas, Root Definition, Stakeholder Perspectives, Constraints | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | LearningOperationsImprovement | LearningRetrospectiveIncidentOperations | Systems thinkingFramingStakeholders | Site Reliability EngineeringIncidentLearningReliability |