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| Criterion |  UX Research Usability Testing |  Operations Failure Mode and Effects Analysis |  Growth A/B Testing |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | 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 | High | High | High |
Timedifferent | 1-2 h je Session | 2-6 h | 1-4 Wochen | 1-6 Wochen |
Participantsdifferent | Based on research question | 3-10 | 1-6 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | FMEA Table, Risk Priority, Mitigation Actions | Experiment results, Decision log, Learning summary | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | ValidationUXPrototype | RiskQualityOperationsRoot cause | ExperimentsGrowthAnalyticsValidation | QualityProblem solvingRoot cause |