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设计过程就是满足约束的过程。在并行设计中，需要考虑来自产品全生命周期中的各种约束。根据这种思想，提出了基于约束的产品评价方法。文中研究了约束满意度和权重的表达，从而对并行设计的评价可根据设计过程中涉及到的约束的满意程度的合成来实现。在此基础上，提出了一种基于约束的产品综合评价方法。最后，给出了基于约束的评价系统的结构和工作原理。
The design process is to meet the constraints of the process. In parallel design, you need to consider the various constraints that come from the product’s full life cycle. According to this idea, a constraint-based product evaluation method is proposed. In this paper, we study the expression of constraint satisfaction and weight, so that the evaluation of parallel design can be realized according to the degree of satisfaction of the constraints involved in the design process. On this basis, a comprehensive product evaluation method based on constraints is proposed. Finally, the structure and working principle of the constraint-based evaluation system are given.