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| Criterion |  DevOps Blameless Postmortem |  Product Strategy DIBB |  DevOps Incident Timeline Analysis |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
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. | DIBB helps clarify target groups, value, goals, and priorities by making the logic behind a decision explicit. It captures results as a DIBB document, belief list, bet list, and learning report. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 30-90 min | 1-2 h | 60-180 min | 45-90 min |
Participantsdifferent | 3-12 | 2-8 | 3-10 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | DIBB document, Belief list, Bet list, Learning report | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | StrategyDecisionAssumptionsHypothesis | IncidentTimelineSite Reliability Engineering | AssumptionsRiskDecisionDiscovery |