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| Criterion |  Operations 8D Problem Solving |  Operations Fishbone Diagram |  Innovation Lotus Blossom |  Operations Kepner-Tregoe |
|---|---|---|---|---|
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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | When a central question feels too large, the method breaks it into neighboring topic fields with their own depth of ideation. It holds structure and openness at the same time, so adjacent perspectives don't get lost. This grows an idea space out of a core problem. | 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 | High | Low | Low | High |
Timedifferent | 1-6 Wochen | 30-60 min | 45-90 min | 2-8 h |
Participantsdifferent | 4-10 | 2-8 | 3-10 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Fishbone Diagram, Cause Categories, Investigation Backlog | Lotus Diagram, Idea Themes, Shortlist | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | QualityProblem solvingRoot cause | Root causeQualityOperations | BrainstormingIdeationCreativityDivergenceWorkshop | Problem solvingRoot causeDecisionOperations |