View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  Decision Making Delphi Method |  Decision Making Three-Point Estimation |  Operations Kepner-Tregoe |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | A single estimate for effort, time, or risk often looks too smooth for the real uncertainty behind it. It separates options, evaluation criteria, and open risks. The result is captured as a Three-Point Estimate, Risk Range, and Assumption Notes. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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 | High | Low |
Timedifferent | 1-4 Wochen | 10-30 min je Item | 2-8 h | 15-30 min |
Participantsdifferent | 6-30 Experten | 1-8 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Three-Point Estimate, Risk Range, Assumption Notes | Problem Analysis, Decision Analysis, Risk Plan | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | EstimationUncertaintyForecasting | Problem solvingRoot causeDecisionOperations | Root causeIncidentLeanProblem solving |