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| Criterion |  DevOps Blameless Postmortem |  Agile 4Ls Retrospective |  Operations Learning Review |  Operations After-Action Review |
|---|---|---|---|---|
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. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 30-90 min | 45–75 min | 1-3 h | 20-45 min |
Participantsdifferent | 3-12 | Team members involved | 3-10 | 3-12 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | 4Ls Board, Learning Themes, Improvement Actions | Learning Review Notes, System Factors, Improvement Actions | Lessons learned, Action items, Event summary |
Tags1 shared | Site Reliability EngineeringIncidentLearningReliability | RetrospectiveLearningReflectionTeam | LearningRetrospectiveIncidentOperations | LearningOperationsImprovement |