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| Criterion |  Agile NoEstimates |  Decision Making Three-Point Estimation |  Operations Getting Things Done |  Operations Ivy Lee Method |
|---|---|---|---|---|
Purposedifferent | When estimating slows a team down more than it helps, it shifts the focus to flow, small slices, and real lead time. It sorts work by value, risk, and delivery ability. The result is captured as Throughput Data, Flow Forecast, and Slicing Rules. | 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. | With many open commitments and ideas in daily life, a reliable external storage system emerges. The method relieves the mind so priority and context don't have to compete in memory. | With a restless workday full of too many open items, the method creates radical simplicity. It directs attention to a short sequence instead of a broad, still-open field. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | laufend | 10-30 min je Item | 1-2 h Setup, laufend | 5-10 min daily |
Participantsdifferent | 2-12 | 1-8 | 1 | 1 |
Formatdifferent | Workshop + async | Workshop + async | Async | Async |
Outputdifferent | Throughput Data, Flow Forecast, Slicing Rules | Three-Point Estimate, Risk Range, Assumption Notes | Action Lists, Project List, Review Routine | Daily Priority List, Completion Notes |
Tagsno overlap | EstimationForecastingFlow | EstimationUncertaintyForecasting | ProductivityPlanningTasksExecution | PrioritizationProductivityExecution |