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| Criterion |  DevOps Blameless Postmortem |  DevOps Incident Timeline Analysis |  Facilitation 3-Circle Venn Diagram |
|---|---|---|---|
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. | For an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable. | When three perspectives matter at the same time, a Three-Circle Venn Diagram shows the overlaps and remainders precisely. It makes visible where shared effect arises and where only a partial perspective applies. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 30-90 min | 60-180 min | 15-45 min |
Participantsdifferent | 3-12 | 3-10 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Venn Diagram, Overlap Notes, Differentiators |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | IncidentTimelineSite Reliability Engineering | ComparisonFacilitationAlignment |
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