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| Criterion |  DevOps Blameless Postmortem |  Facilitation Dot Estimation |  Operations After-Action Review |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
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. | 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | Low | Low | High |
Timedifferent | 30-90 min | 5-20 min | 20-45 min | 2-6 h |
Participantsdifferent | 3-12 | 3-20 | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Effort Heatmap, Risk Signals, Discussion Targets | Lessons learned, Action items, Event summary | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | EstimationEffortRisk | LearningOperationsImprovement | RiskQualityOperationsRoot cause |