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| Criterion |  Operations 5 Whys |  Operations Ivy Lee Method |  Operations Kepner-Tregoe |
|---|---|---|---|
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 disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. |
Complexitydifferent | Low | Low | High |
Timedifferent | 15-30 min | 5-10 min daily | 2-8 h |
Participantsdifferent | 2-6 | 1 | 2-8 |
Formatdifferent | Workshop | Async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Daily Priority List, Completion Notes | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | Root causeIncidentLeanProblem solving | PrioritizationProductivityExecution | Problem solvingRoot causeDecisionOperations |
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