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| Criterion |  Operations Failure Mode and Effects Analysis |  UX Research Affinity Diagramming |  Operations Fault Tree Analysis |
|---|---|---|---|
Purposedifferent | 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 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 critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. |
Complexitydifferent | High | Low | High |
Timedifferent | 2-6 h | 45–90 min | 2-6 h |
Participantsdifferent | 3-10 | 3-10 | 3-8 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | FMEA Table, Risk Priority, Mitigation Actions | Theme clusters, Insight statements, Opportunity areas | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tags1 shared | RiskQualityOperationsRoot cause | SynthesisQualitativeRoot cause | RiskRoot causeSafety |
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