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| Criterion |  Decision Making PERT Estimation |  DevOps Blameless Postmortem |  Facilitation Dot Estimation |  Operations Learning Review |
|---|---|---|---|---|
Purposedifferent | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | 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 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. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | 15-45 min | 30-90 min | 5-20 min | 1-3 h |
Participantsdifferent | 1-8 | 3-12 | 3-20 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Postmortem Doc, Action Items, Timeline | Effort Heatmap, Risk Signals, Discussion Targets | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | EstimationUncertaintyRisk | Site Reliability EngineeringIncidentLearningReliability | EstimationEffortRisk | LearningRetrospectiveIncidentOperations |