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| Criterion |  UX Research Diary Study |  Operations A3 Problem Solving |  Architecture Architecture Decision Record |
|---|---|---|---|
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 complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 1-4 Wochen | 45-90 min | 15-45 min |
Participantsdifferent | 5-20 | 2-5 | 1-3 |
Formatdifferent | Async | Workshop + async | Async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | A3 Report, Action Plan, Root Cause Analysis | ADR File, Decision Log, Rationale |
Tagsno overlap | UX researchTrackingBehavior | LeanProblem solvingCoachingOperations | ArchitectureRationaleDocumentationGovernance |
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