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| Criterion |  DevOps Blameless Postmortem |  Operations Ivy Lee Method |  Operations Family Tree Analysis |
|---|---|---|---|
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. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 30-90 min | 5-10 min daily | 2-4 h |
Participantsdifferent | 3-12 | 1 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Daily Priority List, Completion Notes | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | PrioritizationProductivityExecution | Root causePatternsIncidentSystemic |
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