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| Criterion |  UX Research Diary Study |  Agile Three Amigos |  Operations Root Cause Analysis |
|---|---|---|---|
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 story, test, and implementation could drift apart, it brings business perspective, engineering, and quality together early. It prevents a story from being read differently only late in the process. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 1-4 Wochen | 15-30 min | 1-4 h |
Participantsdifferent | 5-20 | 3 | 3-8 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Clarified Story, Test Examples, Open Questions | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | UX researchTrackingBehavior | CollaborationBehavior-Driven DevelopmentQualityRefinement | Root causeProblem solvingQualityIncident |
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