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| Criterion |  Operations Fishbone Diagram |  Systems Thinking Iceberg Model |  Operations 5 Whys |
|---|---|---|---|
Purposedifferent | 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. | The Iceberg Model separates visible events from patterns, structures, and mental models. This turns a single observation into a deeper understanding of why a problem keeps recurring. | 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. |
Complexitysame | Low | Low | Low |
Timedifferent | 30-60 min | 30-60 min | 15-30 min |
Participantsdifferent | 2-8 | 2-10 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Root cause notes, Countermeasures |
Tags1 shared | Root causeQualityOperations | Systems thinkingRoot causePatterns | Root causeIncidentLeanProblem solving |
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