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| Criterion |  Operations DMAIC |  Operations Fault Tree Analysis |  Operations Fishbone Diagram |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | For a process problem with fluctuating performance, the method brings analysis and improvement into a disciplined sequence. It creates a framework in which numbers, causes, and control come together. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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 | High | Low | Medium |
Timedifferent | 2-12 Wochen | 2-6 h | 30-60 min | 2-4 h |
Participantsdifferent | 3-10 | 3-8 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Fishbone Diagram, Cause Categories, Investigation Backlog | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Continuous improvementQualityProcess improvement | RiskRoot causeSafety | Root causeQualityOperations | Root causeSafetyIncident |