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| Criterion |  DevOps Blameless Postmortem |  Facilitation Dot Estimation |  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 size or effort can only be estimated roughly, Dot Estimation condenses the group's experience into a quick range. It turns individual contributions into a visible selection. The result is captured as an Effort Heatmap, Risk Signals, and Discussion Targets. | 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 | Low | Low |
Timedifferent | 30-90 min | 5-20 min | 45–75 min |
Participantsdifferent | 3-12 | 3-20 | Team members involved |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Effort Heatmap, Risk Signals, Discussion Targets | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | EstimationEffortRisk | RetrospectiveLearningReflectionTeam |
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