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| Criterion |  DevOps Blameless Postmortem |  Decision Making Pre-Mortem |  Operations After-Action Review |  Operations ALPEN Method |
|---|---|---|---|---|
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. | 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. | 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. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 30-90 min | 20–45 min | 20-45 min | 10-20 min daily |
Participantsdifferent | 3-12 | Small cross-functional group | 3-12 | 1 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Risk list, Mitigation plan, Assumption log | Lessons learned, Action items, Event summary | Daily Plan, Time Estimates, Review Notes |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | RiskDecisionFailurePlanning | LearningOperationsImprovement | PlanningTime managementProductivityOperations |