Abstract:
Through the last years the reliable and qualified products is highly desirable. In this study the Giad steel bar evaluated in purpose to determine its quality and process capability using the statistical method and ASTM 615, the study conclude that the out of control points increased with time which indicate the machine tools deterioration, which is approved by process capability analysis, when its show process not capable to produce within control limit according to ASTM 615. The most out of control points is above the specification limit which is mean the higher strength and that does not affect usability but still consider out of control in quality aspect.
