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| Criterion | ![]() UX Research Affinity Diagramming | ![]() Operations 5 Whys | ![]() Operations Kepner-Tregoe | ![]() Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | When research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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. |
Complexitydifferent | Low | Low | High | Medium |
Timedifferent | 45–90 min | 15-30 min | 2-8 h | 45-90 min |
Participantsdifferent | 3-10 | 2-6 | 2-8 | 2-5 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Theme clusters, Insight statements, Opportunity areas | Root cause notes, Countermeasures | Problem Analysis, Decision Analysis, Risk Plan | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | SynthesisQualitativeRoot cause | Root causeIncidentLeanProblem solving | Problem solvingRoot causeDecisionOperations | LeanProblem solvingCoachingOperations |



