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| Criterion |  Decision Making Wideband Delphi |  Operations Fault Tree Analysis |  Decision Making Delphi Method |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus Notes. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | High | High | High | Medium |
Timedifferent | 1-4 h or multiple rounds | 2-6 h | 1-4 Wochen | 2-4 h |
Participantsdifferent | 4-12 Experten | 3-8 | 6-30 Experten | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Expert Forecast, Consensus Range, Assumption Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | EstimationExpertsForecasting | RiskRoot causeSafety | ForecastingExpertsDecisionStrategy | Root causeSafetyIncident |