本文件规定了将田口方法提供的稳健公差设计（RTD）应用于产品以最终确定产品设计的指南。 注1:RTD应用于目标产品，以在标称值周围设置设计参数的最佳公差。RTD识别可控设计参数中的误差对产品输出的影响，并估计公差改变时产品输出的总方差。因此，RTD从鲁棒性、性能和成本的角度实现了输出的目标方差。 注2:公差表示制造过程中设计参数值的最大允许误差。 在一个完美的世界中，每个产品的零件或元件都具有设计参数的设计标称值。然而，实际制造并不能重现所有产品设计参数的准确设计标称值。实际产品的零件或元件的值存在误差。这些误差应在设计公差范围内。

This document specifies guidelines for applying the robust tolerance design (RTD) provided by the Taguchi methods to a product in order to finalize the design of the product. NOTE 1   RTD is applied to the target product to set the optimum tolerances of the design parameters around the nominal values. RTD identifies the effects of errors in the controllable design parameters on product output and estimates the total variance of the product output if the tolerances are changed. Hence, RTD achieves the target variance of the output from the viewpoints of robustness, performance, and cost. NOTE 2   The tolerance expresses a maximum allowable error in the value of a design parameter in the manufacturing process. In a perfect world, the parts or elements of every product have the designed nominal values of the design parameters. However, actual manufacturing does not reproduce the exact designed nominal values of the design parameters for all products. The actual products have errors in the values of their parts or elements. These errors are supposed to be within the designed tolerances.