Comparison Between (X ̅ – R) Charts in Traditional and Deviation Nominal Methods with Usage Process Capability Analysis

Abstract

Most companies aim to reduce costs by minimizing procedures, one of which is to reduce quality costs using statistical control. This research compares the application of the mean chart with  range chart to control the quality of the output. The traditional method and the target dimension method were applied using the Minitab-17 program and  Excel-13 program. Two properties have been studied applied to the lathe machine for gas cylinder neck product. After the statistical adjustment in the two methods, the ability of the face turning (0.69) and the external turning process for length (0.608) were estimated in both ways,and the process indicators were also studied. The target dimension chart can be used to group more than one product into a single chart.