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| Criterion |  Decision Making Assumption Surfacing |  DevOps Blameless Postmortem |  DevOps Incident Timeline Analysis |
|---|---|---|---|
Purposedifferent | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 45-90 min | 30-90 min | 60-180 min |
Participantsdifferent | 2-8 | 3-12 | 3-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Postmortem Doc, Action Items, Timeline | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | Site Reliability EngineeringIncidentLearningReliability | IncidentTimelineSite Reliability Engineering |
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