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| Criterion |  Operations Family Tree Analysis |  Operations 5 Whys |  Delivery Value Stream Mapping |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | 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. | 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 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. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 2-4 h | 15-30 min | 1-3 h | 1-6 Wochen |
Participantsdifferent | 2-6 | 2-6 | 4-10 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Family Tree Diagram, Pattern Notes, Systemic Measures | Root cause notes, Countermeasures | Current-state map, Future-state map, Bottleneck list | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | Root causePatternsIncidentSystemic | Root causeIncidentLeanProblem solving | LeanFlowWasteDelivery | QualityProblem solvingRoot cause |