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| Criterion |  UX Research Diary Study |  Operations 8D Problem Solving |  Systems Thinking Current Reality Tree |
|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. |
Complexitydifferent | Medium | High | High |
Timedifferent | 1-4 Wochen | 1-6 Wochen | 2-6 h |
Participantsdifferent | 5-20 | 4-10 | 3-8 |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | UX researchTrackingBehavior | QualityProblem solvingRoot cause | Systems thinkingRoot causeConstraintsCausality |
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