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| Criterion |  UX Research Diary Study |  Operations DMAIC |  Operations Gemba Walk |
|---|---|---|---|
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 process problem with fluctuating performance, the method brings analysis and improvement into a disciplined sequence. It creates a framework in which numbers, causes, and control come together. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 1-4 Wochen | 2-12 Wochen | 30-120 min |
Participantsdifferent | 5-20 | 3-10 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Observation Notes, Improvement Ideas |
Tagsno overlap | UX researchTrackingBehavior | Continuous improvementQualityProcess improvement | LeanObservationProcessOperations |
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