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| Criterion |  Decision Making PERT Estimation |  Operations Gemba Walk |  Operations Failure Mode and Effects Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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 | High | High |
Timedifferent | 15-45 min | 30-120 min | 2-6 h | 1-6 Wochen |
Participantsdifferent | 1-8 | 2-6 | 3-10 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Observation Notes, Improvement Ideas | FMEA Table, Risk Priority, Mitigation Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | EstimationUncertaintyRisk | LeanObservationProcessOperations | RiskQualityOperationsRoot cause | QualityProblem solvingRoot cause |