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| Criterion |  UX Research Card Sorting |  Operations 8D Problem Solving |  Operations Scatter Diagram |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 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 the question is whether two measures are related, the method makes patterns in the data picture visible. It separates felt correlations from relationships that actually show up in the data. | 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 | Low | High | Low | Low |
Timedifferent | 20-45 min | 1-6 Wochen | 30-90 min | 15-30 min |
Participantsdifferent | Based on research question | 4-10 | 1-4 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Content groups, Label set, IA hypotheses | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Scatter Plot, Korrelationsnotiz, Hypothesenliste | Root cause notes, Countermeasures |
Tagsno overlap | Information architectureNavigationStructure | QualityProblem solvingRoot cause | Root causeQualityVisualization | Root causeIncidentLeanProblem solving |