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| Criterion |  Operations 8D Problem Solving |  UX Research Empathy Mapping |  Operations Barrier Analysis |  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 a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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 | 30–60 min | 2-4 h | 15-30 min |
Participantsdifferent | 4-10 | 4-8 | 2-6 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Empathy Map, Assumptions List, Research Gaps | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | SynthesisQualitativeWorkshop | Root causeSafetyIncident | Root causeIncidentLeanProblem solving |