中文摘要：

针对工程更改影响评估困难的问题，提出了一种基于更改特征预测更改影响的方法．首先提出了更改特征概念，建立了工程更改特征数据模型和更改成本模型，分析了更改特征与工程更改影响的关系，描述了更改影响预测存在的问题；然后详述了基于更改特征预测提出的工程更改产生影响的方法，并给出了相应的更改影响预测计算公式；最后通过应用案例验证了该方法的可行性．

英文摘要：

Engineering change impact assessment （ECIA） was a problem commonly faced by engineering change management （ECM） research scholars and enterprises. In order to solve the problem, this paper presented a change feature-based method to predict the impact of engineering change （EC）. First, for the situation that an EC category belonged to the products or parts alteration in shape, the concept of change feature was proposed. An engineering change feature data model （ECFDM） and a change cost model were constructed. Next, the relationship between change features and the impact of EC were analyzed, and the problems of change impact prediction were described. Then, the change feature-based method to predict the impact of the proposed engineering change effect was detailed with the corresponding prediction formula. Finally, the feasibility of the method was verified by an application case.