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| Criterion |  Operations 5 Whys |  Operations Ivy Lee Method |  Operations A3 Problem Solving |
|---|---|---|---|
Purposedifferent | 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. | With a restless workday full of too many open items, the method creates radical simplicity. It directs attention to a short sequence instead of a broad, still-open field. | 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 | Medium |
Timedifferent | 15-30 min | 5-10 min daily | 45-90 min |
Participantsdifferent | 2-6 | 1 | 2-5 |
Formatdifferent | Workshop | Async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Daily Priority List, Completion Notes | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | Root causeIncidentLeanProblem solving | PrioritizationProductivityExecution | LeanProblem solvingCoachingOperations |
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