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| Criterion |  Delivery Value Stream Mapping |  UX Research Contextual Inquiry |  Operations 8D Problem Solving |  Operations Root Cause Analysis |
|---|---|---|---|---|
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. | When work processes are known only from accounts and the real context stays hidden, Contextual Inquiry makes behavior at the workplace visible. Observation and follow-up questions together show how people actually work, get interrupted, and improvise. | 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 a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 1-3 h | 1-3 Wochen | 1-6 Wochen | 1-4 h |
Participantsdifferent | 4-10 | 4-12 Beobachtungen | 4-10 | 3-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Current-state map, Future-state map, Bottleneck list | Field Notes, Workflow Insights, Pain Points | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | LeanFlowWasteDelivery | UX researchObservationContext | QualityProblem solvingRoot cause | Root causeProblem solvingQualityIncident |