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| Criterion |  UX Research Diary Study |  Operations 8D Problem Solving |  UX Research Affinity Diagramming |
|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | 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 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. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 1-4 Wochen | 1-6 Wochen | 45–90 min |
Participantsdifferent | 5-20 | 4-10 | 3-10 |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Theme clusters, Insight statements, Opportunity areas |
Tagsno overlap | UX researchTrackingBehavior | QualityProblem solvingRoot cause | SynthesisQualitativeRoot cause |
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