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| Criterion |  Operations Root Cause Analysis |  Operations Waste Analysis |  Operations Barrier Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | For a process that keeps people busy but creates little value, the method exposes waste. It directs attention to unnecessary movement, waiting times, rework, and overdelivery. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 1-4 h | 45-120 min | 2-4 h | 1-6 Wochen |
Participantsdifferent | 3-8 | 2-8 | 2-6 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Waste Map, Prioritized Waste, Improvement Backlog | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | Root causeProblem solvingQualityIncident | WasteLeanProcess improvement | Root causeSafetyIncident | QualityProblem solvingRoot cause |