（ ）的准确性取决于模型的成熟度和基础数据的可靠性。
- A.类比估算
- B.三点估算
- C.自下而上
- D.参数估算
正确答案及解析
正确答案
解析
类比估算：是一种使用相似活动或项目的历史数据，来估算项目当前活动或项目的持续时间或成本的技术。
三点估算：通过考虑估算中的不确定性和风险，可以提高活动持续时间估算的准确性。
自下而上估算：先估算单个活动成本、再汇总或“滚动”到更高层次。
参数估算：基于历史数据和项目参数、准确性取决于参数模型的成熟度和基础数据的可靠性。
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