The Monroe method and the equivalent-weight probability method are used to improve the traditional PERT,so as to amend the duration which is calculated by traditional PERT.

• 针对经典PERT方法的不足,用莫尔法来确定重要活动的概率分布,用当量概率法对项目工期进行修正,进而减小经典PERT估算项目工期偏小的可能性。