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| Criterion |  UX Research Diary Study |  Growth A/B Testing |  Operations 5 Whys |
|---|---|---|---|
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. | 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. | 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 | Medium | High | Low |
Timedifferent | 1-4 Wochen | 1-4 Wochen | 15-30 min |
Participantsdifferent | 5-20 | 1-6 | 2-6 |
Formatdifferent | Async | Async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Experiment results, Decision log, Learning summary | Root cause notes, Countermeasures |
Tagsno overlap | UX researchTrackingBehavior | ExperimentsGrowthAnalyticsValidation | Root causeIncidentLeanProblem solving |
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