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| Criterion |  Operations 8D Problem Solving |  UX Research Usability Testing |  Operations Kepner-Tregoe |
|---|---|---|---|
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 product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. |
Complexitydifferent | High | Medium | High |
Timedifferent | 1-6 Wochen | 1-2 h je Session | 2-8 h |
Participantsdifferent | 4-10 | Based on research question | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Usability Issues, Severity List, Recommendations | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | QualityProblem solvingRoot cause | ValidationUXPrototype | Problem solvingRoot causeDecisionOperations |
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