某项目完成估计需要12个月。在进一步分析后认为最少将花8个月，最糟糕的情况下将花28个月。那么，这个估计的PERT值是（）个月。
- A.9
- B.11
- C.13
- D.14
正确答案及解析
正确答案
解析
PERT估算的活动历时均值=（悲观估计值+4最可能估计值+乐观估计值）/6估计该项目完成的时间为（8+4×12+28）/6=14个月。
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