Use of range control charts in determination of variability in surface parallelisms of plates

Abstract

Statistical Process Control methods are used to measure and diagnose variability occurring within processes. In this study, surface parallelisms in plates cut by circle saw block cutter machine from marble blocks were determined by Range (R) control charts produced by thickness measurements of plates. Correlation between surface parallelisms of plates cut was examined. It was suggested that the use of correlation analysis to determine similarities and differences among plates cut at different levels was significant for control of machinery and R control charts.