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| Criterion |  Operations 8D Problem Solving |  Systems Thinking Iceberg Model |  Operations Barrier Analysis |  Operations Root Cause Analysis |
|---|---|---|---|---|
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. | 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 risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | High | Low | Medium | Medium |
Timedifferent | 1-6 Wochen | 30-60 min | 2-4 h | 1-4 h |
Participantsdifferent | 4-10 | 2-10 | 2-6 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tags1 shared | QualityProblem solvingRoot cause | Systems thinkingRoot causePatterns | Root causeSafetyIncident | Root causeProblem solvingQualityIncident |