Replaces single-point guesses with structured three-point estimates: decomposes work into atomic units, estimates best/likely/worst case for each, identifies unknowns and assumptions, calculates aggregate ranges using PERT, and assigns confidence levels with explicit rationale.
| references/estimation-methods.md | PERT formula, three-point estimation, Monte Carlo basics | Always | | references/unknown-categories.md | Technical, scope, external, and organizational uncertainty types | Unknown identification | | references/calibration-tips.md | Cognitive biases in estimation, historical calibration, buffer strategies | Always |
| references/sizing-heuristics.md | Common task size patterns, complexity indicators, reference class data | Quick sizing needed |
生成具有明确未知数、置信区间和假设文档的校准三点估计(最佳/可能/最差情况)。将工作分解为原子单元,识别技术和范围不确定性,计算 PERT 范围,并提供置信理由。触发:“估计这个”、“这需要多长时间”、“工作量估计”、“时间估计”、“最好情况最坏情况”、“置信区间”、“尺寸”、“估计工作量”、“这个有多大”、“故事点”、“T 恤尺寸”、“估计工作量”、“PERT”。不适用于任务分解、实施计划或依赖关系映射 - 请改用任务分解器。当任务或项目需要具有明确不确定性的工作量估计时,请使用此技能。 来源:mathews-tom/praxis-skills。