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| Criterion |  Decision Making Constraint Analysis |  Operations 8D Problem Solving |  Decision Making Pre-Mortem |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 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 early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. | 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 | Low | High | Low | Low |
Timedifferent | 30-90 min | 1-6 Wochen | 20–45 min | 15-30 min |
Participantsdifferent | 2-8 | 4-10 | Small cross-functional group | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Risk list, Mitigation plan, Assumption log | Root cause notes, Countermeasures |
Tagsno overlap | ConstraintsDecisionPlanningOptions | QualityProblem solvingRoot cause | RiskDecisionFailurePlanning | Root causeIncidentLeanProblem solving |