Improving the process capability of a turning operation by the application of statistical techniques
Izboljšanje procesa sposobnosti struženja z uporabo statistične tehnike

english

2009

volume 43, issue 1

Inštitut za kovinske materiale in tehnologije
(Obvezni izvod spletne publikacije)

Process-capability indices are effective tools for the continuous improvement of quality, productivity and managerial decisions. Statistical process-control techniques improve the quality in mass production. In this study, a process-capability analysis was carried out in the machining line of a medium-sized company that produces machine and spare parts. For this purpose, normal probability plots and histograms were prepared and the process-capability indices Csubp and Csub{pk} were calculated. It is shown that the process capability for the whole process was inadequate and that the mass production was unstable. In order to satisfy the process-capability measures it is necessary to improve the quality level by shifting the process mean to the target value and reducing the variations in the process.

08.06.2010