This paper addresses a systematic and scientific tolerance design method-six sigma tolerance design. First a specifically quantified goal is determined for tolerance design with an assembly case analysis to show how six sigma is designed into the product. The design and optimized flow is put forward. This method leads to a set of design principles and practices which are embodied in the thinking of concurrent engineering (CE). The philosophy underlying design for manufacturability (DFM) finds expression in CE. Six sigma tolerance design provides a way to achieve six sigma quality and beyond. It is the result of requirements for higher quality product at lower costs.

本文以天津市某橡胶公司轮胎产品设计为对象，采用双响应曲面方法对轮胎生产过程中的一个重要质量特征（胶料硬度）进行了优化，并根据双响应曲面方法设计了试验设计软件，试验设计结果找到了达到胶料硬度目标并减少硬度变异的配比条件。