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| Criterion |  Operations 8D Problem Solving |  Decision Making Constraint Analysis |  Operations Fishbone Diagram |  Operations Failure Mode and Effects 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 an initiative stalls, the limit often lies not in the idea but in hard or soft boundary conditions. Constraint Analysis separates these limits and shows which of them can actually be shaped. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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. |
Complexitydifferent | High | Low | Low | High |
Timedifferent | 1-6 Wochen | 30-90 min | 30-60 min | 2-6 h |
Participantsdifferent | 4-10 | 2-8 | 2-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Fishbone Diagram, Cause Categories, Investigation Backlog | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | QualityProblem solvingRoot cause | ConstraintsDecisionPlanningOptions | Root causeQualityOperations | RiskQualityOperationsRoot cause |