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分析了影响水利水电工程未完建项目投资偏差的原因，并将其分为两类：一类是与合同单价构成相关的，另一类是与合同单价构成无关的．对于基础单价引起的投资偏差的预测，首先将各种主要因素进行分解，并确定其权重，然后用灰色马尔柯夫链模型预测各因子的单价；对于与合同单价构成无关的原因引起的投资偏差，则采用期望预测法进行预测．
The reasons that affect the investment deviation of unfinished projects in water conservancy and hydropower projects are analyzed and divided into two categories: one is related to the unit price of the contract and the other is not related to the unit price of the contract. For the forecast of the investment deviation caused by the basic unit price, the main factors are firstly decomposed and their weights are determined. Then the unit price of each factor is predicted by the gray Markov chain model. For the investment deviation caused by the unrelated unit price of the contract, Prediction using expectation forecasting method.