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| Criterion |  UX Research Diary Study |  Operations 5 Whys |  Growth A/B Testing |
|---|---|---|---|
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 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. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. |
Complexitydifferent | Medium | Low | High |
Timedifferent | 1-4 Wochen | 15-30 min | 1-4 Wochen |
Participantsdifferent | 5-20 | 2-6 | 1-6 |
Formatdifferent | Async | Workshop | Async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Root cause notes, Countermeasures | Experiment results, Decision log, Learning summary |
Tagsno overlap | UX researchTrackingBehavior | Root causeIncidentLeanProblem solving | ExperimentsGrowthAnalyticsValidation |
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