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| Criterion |  Engineering Fault Isolation |  DevOps Incident Command |  Operations After-Action Review |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | 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. | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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 | Medium | Medium | Low | Medium |
Timedifferent | 30-180 min | As needed | 20-45 min | 30-90 min |
Participantsdifferent | 1-6 | 4-15 | 3-12 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Incident Log, Action Tracker, Stakeholder Updates | Lessons learned, Action items, Event summary | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | TroubleshootingDiagnosisEngineering | IncidentOperationsReliability | LearningOperationsImprovement | Site Reliability EngineeringIncidentLearningReliability |