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| Criterion |  DevOps Blameless Postmortem |  Decision Making Assumption Surfacing |  Operations After-Action Review |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Medium | Low | Low | Medium |
Timedifferent | 30-90 min | 45-90 min | 20-45 min | 45-60 min |
Participantsdifferent | 3-12 | 2-8 | 3-12 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Assumption List, Critical Assumptions, Learning Plan | Lessons learned, Action items, Event summary | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | AssumptionsRiskDecisionDiscovery | LearningOperationsImprovement | AssumptionsRiskExperimentsValidation |