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| Criterion |  Operations 8D Problem Solving |  Operations Root Cause Tree Analysis |  DevOps Blameless Postmortem |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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. | 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 risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | High | Medium | Medium | Medium |
Timedifferent | 1-6 Wochen | 1-3 h | 30-90 min | 2-4 h |
Participantsdifferent | 4-10 | 2-8 | 3-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Cause Tree, Evidence Notes, Countermeasures | Postmortem Doc, Action Items, Timeline | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | QualityProblem solvingRoot cause | Root causeTreeIncidentQuality | Site Reliability EngineeringIncidentLearningReliability | Root causeSafetyIncident |