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由曲面数字化点进行曲面重构后的误差评价是反求工程需要解决的关键技术问题。随着计算机网络飞速发展以及反求工程的应用领域不断扩大，曲面拟合误差作为反求评价的单一目标已不能满足反求工程中产品设计制造的需要。在分析反求评价需求的基础上，提出了宽公差复杂曲面反求的多目标评价概念，建立了多目标评价模型，给出了模糊层次分析法的多目标评价方法，提出了网络化的反求工程多目标评价方式。
The error evaluation after the surface reconstruction by the surface digitization point is the key technical problem to be solved in reverse engineering. With the rapid development of computer networks and the field of application of reverse engineering, the error of surface fitting as a single objective of reverse evaluation can not meet the needs of product design and manufacturing in reverse engineering. Based on the analysis of the demand of reverse evaluation, the concept of multi-objective evaluation of complex tolerance of complex surface with wide tolerance is put forward. The multi-objective evaluation model is established, the multi-objective evaluation method of fuzzy AHP is given, Seeking project multi-objective evaluation method.