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| Criterion |  Systems Thinking Future Reality Tree |  Decision Making Pre-Mortem |  Operations Root Cause Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | 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 | High | Low | Medium | High |
Timedifferent | 2-4 h | 20–45 min | 1-4 h | 1-6 Wochen |
Participantsdifferent | 3-8 | Small cross-functional group | 3-8 | 4-10 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Risk list, Mitigation plan, Assumption log | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | RiskDecisionFailurePlanning | Root causeProblem solvingQualityIncident | QualityProblem solvingRoot cause |