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| Criterion |  DevOps Blameless Postmortem |  Operations Ivy Lee Method |  Operations ABC Analysis |  Operations After-Action Review |
|---|---|---|---|---|
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. | With a restless workday full of too many open items, the method creates radical simplicity. It directs attention to a short sequence instead of a broad, still-open field. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 30-90 min | 5-10 min daily | 30-60 min | 20-45 min |
Participantsdifferent | 3-12 | 1 | 1-5 | 3-12 |
Formatdifferent | Workshop + async | Async | Async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Daily Priority List, Completion Notes | ABC Classification, Focus Rules, Control List | Lessons learned, Action items, Event summary |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | PrioritizationProductivityExecution | PrioritizationOperationsPortfolio | LearningOperationsImprovement |