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| Criterion |  Operations DMAIC |  Operations Root Cause Tree Analysis |  Operations Waste Analysis |  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 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. | For a process that keeps people busy but creates little value, the method exposes waste. It directs attention to unnecessary movement, waiting times, rework, and overdelivery. | 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 | Low | Medium |
Timedifferent | 2-12 Wochen | 1-3 h | 45-120 min | 2-4 h |
Participantsdifferent | 3-10 | 2-8 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Cause Tree, Evidence Notes, Countermeasures | Waste Map, Prioritized Waste, Improvement Backlog | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Continuous improvementQualityProcess improvement | Root causeTreeIncidentQuality | WasteLeanProcess improvement | Root causeSafetyIncident |