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| Criterion |  Operations 8D Problem Solving |  Decision Making Trade-off Analysis |  Decision Making Constraint Analysis |  Operations 5 Whys |
|---|---|---|---|---|
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. | With limited resources, quality, speed, cost, and risk almost always compete with each other. Trade-off Analysis makes these tensions explicit and prevents decisions from producing hidden side effects. | 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. | 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. |
Complexitydifferent | High | Medium | Low | Low |
Timedifferent | 1-6 Wochen | 45-120 min | 30-90 min | 15-30 min |
Participantsdifferent | 4-10 | 2-8 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Trade-off Matrix, Criteria List, Decision Rationale, Accepted Downsides | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | TradeoffsDecisionCriteriaOptions | ConstraintsDecisionPlanningOptions | Root causeIncidentLeanProblem solving |