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| Criterion |  Delivery Value Stream Mapping |  Operations Fault Tree Analysis |  Operations MORT Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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 | High | High | Low |
Timedifferent | 1-3 h | 2-6 h | Mehrere Tage bis Wochen | 15-30 min |
Participantsdifferent | 4-10 | 3-8 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Current-state map, Future-state map, Bottleneck list | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Root cause notes, Countermeasures |
Tagsno overlap | LeanFlowWasteDelivery | RiskRoot causeSafety | Root causeSafetySystemicIncident | Root causeIncidentLeanProblem solving |