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| Criterion |  Operations 5 Whys |  Operations 8D Problem Solving |  Decision Making Pareto Analysis |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | In many problem situations, effect is distributed unequally across many causes. A Pareto Analysis separates the few drivers with high leverage from the long remainder and focuses attention on what measurably moves the needle. | 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. |
Complexitydifferent | Low | High | Low | Medium |
Timedifferent | 15-30 min | 1-6 Wochen | 30-60 min | 2-4 h |
Participantsdifferent | 2-6 | 4-10 | 1-6 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Pareto Chart, Top Causes, Focus List | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tags1 shared | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause | PrioritizationQualityFocusRoot cause | Root causeSafetyIncident |