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| Criterion |  Operations Ivy Lee Method |  Systems Thinking Current Reality Tree |  Operations 5 Whys |  Operations Eat the Frog |
|---|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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. | The method protects energy and attention for the task that creates the largest progress and is often postponed. |
Complexitydifferent | Low | High | Low | Low |
Timedifferent | 5-10 min daily | 2-6 h | 15-30 min | 15-90 min daily |
Participantsdifferent | 1 | 3-8 | 2-6 | 1 |
Formatdifferent | Async | Workshop | Workshop | Async |
Outputdifferent | Daily Priority List, Completion Notes | Current Reality Tree, Core Problems, Intervention Ideas | Root cause notes, Countermeasures | Priority Task, Completion Note, Daily Focus |
Tagsno overlap | PrioritizationProductivityExecution | Systems thinkingRoot causeConstraintsCausality | Root causeIncidentLeanProblem solving | PrioritizationProductivityFocusExecution |