一项工程计划常常包含很多不确定性的因素,使效益和费用与估计值有不少出入,其原因有的来自工程本身的不确定性,有的来自水文因素的概率性,更多的来自各种社会和经济因素。在工程计划中如何考虑这些不确定因素,是需要研究的问题,下面介绍几种常用的研究不确定因素的方法,其中前三种方法既可用于经济分析,也可用于财务分析,而第四种方法只能用于财务分析。 A project plan often contains a lot of uncertainty factors, the benefits and costs are quite different from the estimated value, because of some of the uncertainty from the project itself, some from the probability of hydrological factors, more from Various social and economic factors. How to consider these uncertainties in the project plan is a problem that needs to be studied. Here are some commonly used methods to study the uncertainties. The first three methods can be used for both economic analysis and financial analysis, while the fourth The method can only be used for financial analysis.