S.R.ADKE AND X.HONG 913.Pp228-23】 K.CB.Dos art-T WHFELER.D. and CHA pp. Mos D.C.(1 996).Introds sure ments".of Technology 14.pp.172-173 Journal of Quality Technology Vol.9.No.1.January 1997 Reproduced with permission of the copyright owner.Further reproduction prohibited without permission. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission