Vol.20 No.4 孙静等：接近零不合格品过程的判稳与判异 ·403· 99.024%=0.976%. 比较上述3条准则可见，在判异准则的显著性水平α为0.01的条件下，判稳准则I的显著 性水平要比判稳准则Ⅱ，Ⅲ的显著性水平大好几倍，故准则I,ⅢⅢ得出的结论要比准则I更 为可信，只是为了在实际中能更快地得出结果才设立判稳准则I,严格地讲，判稳应主要考 虑准则Ⅱ，Ⅲ. 5结论 为了解决接近零不合格品生产过程的质量控制问题，国外有关文献提出了利用累积合格 品数的方法，本文在此基础上，进一步提出接近零不合格品生产过程的基本模式，深化了这一 方法，并提出一套完整实用的判异、判稳准则， 参考文献 1 Xie M,Goh T N.Some Procedures for Decision Making in Controlling High Yield Processes. Quality and Reliability Engineering International,1992,8:355 2 Xie M,Goh T N.SPC of A Near Zero-Defect Process Subject to Random Shock.Quality and Reliability Engineering International,1993.9:89 3李学方，准确地理解“不合格和“缺陷”.中国质量认证，1997,15：20 Statistical Control Criteria and Abnormality Criteria of Near Zero Non-conformity Process Sun Jing☑hang Gongx Management Science Institute,UST Beijing.Beijing 100083,China ABSTRACT For the near zero non-conformity process,the traditional SPC theory should be developed to adapt the new situation.Using the cumulative number of conforming items as a statistic has been proved to be an effective way to research this near zero non-conformity process.On this basis,a complete criteria for statistical control and or abnormality are proposed. KEY WORDS quality controls near zero non-conformity production process;consecutive number of conformity items;criteria for statistical control;criteria for abnormality