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| Criterion |  Operations Ivy Lee Method |  Operations A3 Problem Solving |  Operations ABC Analysis |  Operations Gemba Walk |
|---|---|---|---|---|
Purposedifferent | 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. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | 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 | Low | Medium | Low | Low |
Timedifferent | 5-10 min daily | 45-90 min | 30-60 min | 30-120 min |
Participantsdifferent | 1 | 2-5 | 1-5 | 2-6 |
Formatdifferent | Async | Workshop + async | Async | Workshop |
Outputdifferent | Daily Priority List, Completion Notes | A3 Report, Action Plan, Root Cause Analysis | ABC Classification, Focus Rules, Control List | Observation Notes, Improvement Ideas |
Tagsno overlap | PrioritizationProductivityExecution | LeanProblem solvingCoachingOperations | PrioritizationOperationsPortfolio | LeanObservationProcessOperations |