关于对过程能力指数西格玛判定水平的讨论

Through the ability to pre-process research index formula, the reunification of the unilateral and bilateral process capability index formula and calculation methods. But the process of unilateral ability to index the results of the low given the issue required further study to resolve. In a new awareness of the Sigma on the basis of this paper to unilateral standardized product quality characteristics and distribution of quality index reached its discussion of the Sigma level, as a basis for regulating the process to determine the unilateral ability to index, with bilateral Sigma process capability index determine the level of consistency.