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中文摘要：
通过比较Taguchi过程能力指数Cpm和Cpmk不同于传统的指数Cp和Cpk,指出Taguchi指数反映的是过程输出满足质量损失要求而非合格率的能力;提出均值和标准差变化对不同指数有着不同的影响,指数Cpk比Cpm对标准差的变化更敏感,指数Cpmk对均值的变化最敏感;分析了指数Cpk与合格率的近似对应关系,Taguchi指数与合格率没有确定的一一对应关系,但存在对应区间.通过讨论认为,实践中选用过程能力指数反映了组织的不同质量目标--短期合同要求还是长期＂卓越质量＂.
英文摘要：
The Taguchi PCIs （Cpm and Cpmk） are compared to tradition PCIs （Cp and Cpk）. They reflect the capability to meet the demand on quality loss not on proportion conformance. The mean and variance have different influence on the PCIs. The index Cpk is more sensitive than Cpm to changing of variance. The index Cpmk is most sensitive to changing of mean. By constructing the quantitative relation between proportion conformance and these PCIs, the approximate 1- 1 relation between Cpk and conformance proportion are verified and it is concluded that there are the 1-1 corresponding relation to the Taguchi PCIs. The choice of suited PCI in practice represents different quality targets-contract demand （short term） or perfect quality （long term）.
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