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| Criterion |  Operations 8D Problem Solving |  UX Research Affinity Diagramming |  Product Strategy KPI Tree |  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 research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | When metrics across the organization drift apart, it arranges drivers and effects under one shared logic. It connects customer value, product logic, and decision priorities. The result is captured as a KPI tree and owner list. | 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 | Low | Medium | Low |
Timedifferent | 1-6 Wochen | 45–90 min | 90-180 min initial, dann laufend | 15-30 min |
Participantsdifferent | 4-10 | 3-10 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Theme clusters, Insight statements, Opportunity areas | KPI Tree, Owner List | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | SynthesisQualitativeRoot cause | MetricsStrategyAlignmentMeasurement | Root causeIncidentLeanProblem solving |