Asupplementary test based on the control chart for individuals anABUINFORM Global A Supplementary Test Based on the Control Chart for Individuals S.R.ADKE University of Pune,Pune-411007,Indi X.HONG Wright State University.Dayton, The conventional practice of employing the moving range chart(MR chart)as a companion chart to the()We here isa shift in the process variance.We conclude.on the basis of the relevant probabilities that the nhe MR chart6co3nu6n之 This test does no Introduction in the hter tine.Haw nique to detect shifts in the process variance.Ma ed that Gregorand (193)advocate the use e of the gopsesiqueatitaouradeiehL.Ho charts for the same practicalsi Crowder (19871 ted the ioiut the chart and the MR chart throug (i.e.using subgrouns of size one). cedure Wheeler and Chambers (1986)also recom use these stimate to control varia on the MR hart but not on the chart. in th mean an the ndivid servations are available. estioned the plotting of the MR ol chart cha oys moving ranges with a moving range chart (MR chart)of suc pretation.and (b) ai X ont≥2.of indiv D( some mensure of the sprend in -value Dr.Adke is a retired Profe rt.Their Mr.Hong is a graduate student. some conditional probabilities. of Qualiy Technology Vol.29.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. A supplementary test based on the control chart for individuals Adke, S R; Hong, X Journal of Quality Technology; Jan 1997; 29, 1; ABI/INFORM Global pg. 16