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| Criterion |  Operations 8D Problem Solving |  Operations Ivy Lee Method |  Operations 5 Whys |  Operations Eat the Frog |
|---|---|---|---|---|
Purposedifferent | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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 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 | High | Low | Low | Low |
Timedifferent | 1-6 Wochen | 5-10 min daily | 15-30 min | 15-90 min daily |
Participantsdifferent | 4-10 | 1 | 2-6 | 1 |
Formatdifferent | Workshop + async | Async | Workshop | Async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Daily Priority List, Completion Notes | Root cause notes, Countermeasures | Priority Task, Completion Note, Daily Focus |
Tagsno overlap | QualityProblem solvingRoot cause | PrioritizationProductivityExecution | Root causeIncidentLeanProblem solving | PrioritizationProductivityFocusExecution |