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| Criterion |  Operations 8D Problem Solving |  Facilitation Dot Estimation |  Decision Making PERT Estimation |  Operations Fault Tree 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. | When size or effort can only be estimated roughly, Dot Estimation condenses the group's experience into a quick range. It turns individual contributions into a visible selection. The result is captured as an Effort Heatmap, Risk Signals, and Discussion Targets. | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. |
Complexitydifferent | High | Low | Medium | High |
Timedifferent | 1-6 Wochen | 5-20 min | 15-45 min | 2-6 h |
Participantsdifferent | 4-10 | 3-20 | 1-8 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Effort Heatmap, Risk Signals, Discussion Targets | PERT Estimate, Expected Value, Risk Notes | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | QualityProblem solvingRoot cause | EstimationEffortRisk | EstimationUncertaintyRisk | RiskRoot causeSafety |