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| Criterion |  DevOps Blameless Postmortem |  Engineering Kanban |  Agile 4Ls Retrospective |
|---|---|---|---|
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 work sits in too many parallel streams, throughput suffers and no one sees the bottlenecks. Kanban makes the flow of work visible and limits overload so a system becomes calmer and more predictable. | 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. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 30-90 min | Ongoing | 45–75 min |
Participantsdifferent | 3-12 | 2-12 | Team members involved |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Kanban board, WIP policies, Flow metrics | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | FlowVisual managementDelivery | RetrospectiveLearningReflectionTeam |
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