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| Criterion |  Operations 8D Problem Solving |  Delivery Value Stream Mapping |  Operations DMAIC |  Operations 5 Whys |
|---|---|---|---|---|
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. | 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 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 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 | High | Medium | High | Low |
Timedifferent | 1-6 Wochen | 1-3 h | 2-12 Wochen | 15-30 min |
Participantsdifferent | 4-10 | 4-10 | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Current-state map, Future-state map, Bottleneck list | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | LeanFlowWasteDelivery | Continuous improvementQualityProcess improvement | Root causeIncidentLeanProblem solving |