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| Criterion |  UX Research Diary Study |  Operations A3 Problem Solving |  Systems Thinking Behavior Over Time Graph |  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 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. | A Behavior Over Time Graph shows how a metric or observation develops over time. The method makes trends, breaks, and recurring patterns visible that get lost in snapshots. | 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 | Medium | Low | Low |
Timedifferent | 1-4 Wochen | 45-90 min | 20-45 min | 30-120 min |
Participantsdifferent | 5-20 | 2-5 | 1-10 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | A3 Report, Action Plan, Root Cause Analysis | Behavior Over Time Graph, Trend Hypotheses, Key Events | Observation Notes, Improvement Ideas |
Tagsno overlap | UX researchTrackingBehavior | LeanProblem solvingCoachingOperations | Systems thinkingPatternsDynamics | LeanObservationProcessOperations |