Bahmani, P.
[ 1 ] - برآورد فاصلهای ضریب کارایی فرآیند
Several sampling distribution properties of the estimator for Cpk are presented under the assumption that the data are normal, independent and identically distributed. In this paper using these assumptions, the expectation, variance and skewness are calculated by statistical methods, since the sampling distribution is weakly skewed, it is concluded that a symmetric interval estimator for Cpk mi...
[ 2 ] - تحلیل واریانس فرآیند برای با وجود خودهمبستگی دادهها
A primary assumption of many procedures in statistical process control and in process capability analysis is that the observations taken from the process are independent . However many processes exhibit a certain degree of autocorrelation. In this paper we discuss the effects that autocorrelation may have on process variance and capability indices and we show that when autocorrelation exists, ...
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