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| Criterion |  Operations Root Cause Tree Analysis |  Delivery Value Stream Mapping |  Operations MORT Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | When delivery work dissolves into wait times, handoffs, and hidden effort, Value Stream Mapping makes the actual flow visible. The method exposes bottlenecks, idle time, and feedback loops so lead time and improvement levers become tangible. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 1-3 h | 1-3 h | Mehrere Tage bis Wochen | 15-30 min |
Participantsdifferent | 2-8 | 4-10 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop |
Outputdifferent | Cause Tree, Evidence Notes, Countermeasures | Current-state map, Future-state map, Bottleneck list | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Root cause notes, Countermeasures |
Tagsno overlap | Root causeTreeIncidentQuality | LeanFlowWasteDelivery | Root causeSafetySystemicIncident | Root causeIncidentLeanProblem solving |