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| Criterion |  Engineering Failure Scenario Analysis |  Systems Thinking Future Reality Tree |  Operations Change Analysis |
|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | 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. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | Medium | High | Medium |
Timedifferent | 1-3 h | 2-4 h | 45-120 min |
Participantsdifferent | 3-8 | 3-8 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | FailureResilienceRisk | Theory of ConstraintsSystems thinkingChange | ChangeRoot causeTroubleshootingComparison |
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