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| Criterion |  Decision Making Assumption Surfacing |  DevOps Incident Timeline Analysis |  Operations Causal Factor Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|---|
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. | 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. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | 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. |
Complexitydifferent | Low | Medium | High | Medium |
Timedifferent | 45-90 min | 60-180 min | 2-6 h | 30-90 min |
Participantsdifferent | 2-8 | 3-10 | 3-10 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | IncidentTimelineSite Reliability Engineering | CausalityIncidentRoot causeTimeline | Site Reliability EngineeringIncidentLearningReliability |