以公差优化为目标进行制造成本估算是对公差———成本关系进行建模的基础问题。文章分析比较了传统的制造成本的计算方法，提出了已知制造系统状态时对公差———制造成 本关系的建模 方法———多参数公式法，详细阐述了该方法的使用环境以及提出该方法的必要性及合理性，并以实例对其可用性进行了说明和验证。 Manufacturing Cost Estimation, Targeting Tolerance Optimization, is a fundamental issue in modeling the relationship of tolerances to costs. The paper analyzes and compares the traditional method of manufacturing cost calculation, and proposes a multi-parameter formula method which is a modeling method to the relationship between manufacturing cost and the manufacturing cost of the system. The environment of the method and its application are proposed The necessity and rationality of the method, and illustrates its availability by examples.