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| Criterion |  DevOps Incident Timeline Analysis |  DevOps Blameless Postmortem |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|
Purposedifferent | 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. | 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 a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | Medium | High |
Timedifferent | 60-180 min | 30-90 min | 2-6 h |
Participantsdifferent | 3-10 | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Postmortem Doc, Action Items, Timeline | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | IncidentTimelineSite Reliability Engineering | Site Reliability EngineeringIncidentLearningReliability | RiskQualityOperationsRoot cause |
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