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| Criterion |  Decision Making Assumption Surfacing |  Operations ALPEN Method |  DevOps Blameless Postmortem |  Decision Making Pre-Mortem |
|---|---|---|---|---|
Purposedifferent | 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. | With an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. | 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. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 45-90 min | 10-20 min daily | 30-90 min | 20–45 min |
Participantsdifferent | 2-8 | 1 | 3-12 | Small cross-functional group |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Daily Plan, Time Estimates, Review Notes | Postmortem Doc, Action Items, Timeline | Risk list, Mitigation plan, Assumption log |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | PlanningTime managementProductivityOperations | Site Reliability EngineeringIncidentLearningReliability | RiskDecisionFailurePlanning |