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| Criterion |  Decision Making PERT Estimation |  DevOps Blameless Postmortem |  Agile Ideal Days |  DevOps Incident Timeline Analysis |
|---|---|---|---|---|
Purposedifferent | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | 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 effort needs to be thought of as real working time, it offers a simple common denominator for comparison. It sorts work by value, risk, and delivery ability. The result is captured as Ideal Day Estimates, Assumption Notes, and Capacity Caveats. | 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 | Medium | Medium | Low | Medium |
Timedifferent | 15-45 min | 30-90 min | 15-60 min | 60-180 min |
Participantsdifferent | 1-8 | 3-12 | 2-9 | 3-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Postmortem Doc, Action Items, Timeline | Ideal Day Estimates, Assumption Notes, Capacity Caveats | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions |
Tagsno overlap | EstimationUncertaintyRisk | Site Reliability EngineeringIncidentLearningReliability | EstimationEffortAgile | IncidentTimelineSite Reliability Engineering |