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| Criterion |  Operations MORT Analysis |  UX Research Card Sorting |  Operations 5 Whys |
|---|---|---|---|
Purposedifferent | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | 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 | Low |
Timedifferent | Mehrere Tage bis Wochen | 20-45 min | 15-30 min |
Participantsdifferent | 2-6 | Based on research question | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Content groups, Label set, IA hypotheses | Root cause notes, Countermeasures |
Tagsno overlap | Root causeSafetySystemicIncident | Information architectureNavigationStructure | Root causeIncidentLeanProblem solving |
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