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| Criterion |  Engineering Failure Scenario Analysis |  DevOps Blameless Postmortem |  Operations Fishbone Diagram |
|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | 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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 1-3 h | 30-90 min | 30-60 min |
Participantsdifferent | 3-8 | 3-12 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Postmortem Doc, Action Items, Timeline | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | FailureResilienceRisk | Site Reliability EngineeringIncidentLearningReliability | Root causeQualityOperations |
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