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| Criterion |  Operations 8D Problem Solving |  Operations Kepner-Tregoe |  UX Research Affinity Diagramming |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
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. | 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. | 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. | 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. |
Complexitydifferent | High | High | Low | High |
Timedifferent | 1-6 Wochen | 2-8 h | 45–90 min | 2-6 h |
Participantsdifferent | 4-10 | 2-8 | 3-10 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Problem Analysis, Decision Analysis, Risk Plan | Theme clusters, Insight statements, Opportunity areas | FMEA Table, Risk Priority, Mitigation Actions |
Tags1 shared | QualityProblem solvingRoot cause | Problem solvingRoot causeDecisionOperations | SynthesisQualitativeRoot cause | RiskQualityOperationsRoot cause |