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| Criterion |  UX Research Diary Study |  Operations PDCA Cycle |  Product Discovery Fake Door Test |
|---|---|---|---|
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 improvement that still has to prove itself in everyday work, the method runs it through small learning loops. It connects planning, checking, and standardization into a repeatable learning mode. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 1-4 Wochen | 1 h bis mehrere Wochen | 1-5 Tage |
Participantsdifferent | 5-20 | 1-8 | Nutzertraffic |
Formatdifferent | Async | Workshop + async | Async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | UX researchTrackingBehavior | Continuous improvementLeanExperiments | ValidationExperimentsDemandDiscovery |
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