In order to achieve the improvement goals of performances of ECs in an economic and effective way, an integrated methodology for determining the IIRs of ECs based on value evaluations was proposed.

• 为了以一种经济和有效的方式实现工程特性表现的改进目标，提出了一种基于效用评价的工程特性改进重要度确定的综合方法。