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| Criterion |  Delivery Value Stream Mapping |  Systems Thinking Iceberg Model |  Operations 8D Problem Solving |  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. | The Iceberg Model separates visible events from patterns, structures, and mental models. This turns a single observation into a deeper understanding of why a problem keeps recurring. | 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. | 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 | Low | High | Low |
Timedifferent | 1-3 h | 30-60 min | 1-6 Wochen | 15-30 min |
Participantsdifferent | 4-10 | 2-10 | 4-10 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Current-state map, Future-state map, Bottleneck list | Iceberg Worksheet, Pattern Notes, Intervention Ideas | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Root cause notes, Countermeasures |
Tagsno overlap | LeanFlowWasteDelivery | Systems thinkingRoot causePatterns | QualityProblem solvingRoot cause | Root causeIncidentLeanProblem solving |