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Selected:Failure Mode and Effects AnalysisBlameless PostmortemIncident CommandRoot Cause Tree Analysis
| Criterion |  Operations Failure Mode and Effects Analysis |  DevOps Blameless Postmortem |  DevOps Incident Command |  Operations Root Cause Tree Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | Medium | Medium | Medium |
Timedifferent | 2-6 h | 30-90 min | As needed | 1-3 h |
Participantsdifferent | 3-10 | 3-12 | 4-15 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | FMEA Table, Risk Priority, Mitigation Actions | Postmortem Doc, Action Items, Timeline | Incident Log, Action Tracker, Stakeholder Updates | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | RiskQualityOperationsRoot cause | Site Reliability EngineeringIncidentLearningReliability | IncidentOperationsReliability | Root causeTreeIncidentQuality |