Improving the Process Capability of a Boring Operation by the Application of Statistical Techniques

Parvesh Kumar Rajvanshi, Dr. R.M.Belokar

QC 42

Abstract-

In this paper we have discussed what Process Capability is and how it is implemented. All the steps are listed out in an easy to understand manner. Process Capability Methodology is presented representing the important phases of it.

A case study has also been discussed involving a commonly used product of bath fittings used in our day to day life.

Process-capability indices are effective tools for the continuous improvement of quality, productivity and managerial decisions. Statistical Process Control (SPC) 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 P C and Pk C  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.

Key Words-

Boring Operation, Control Chart, Process Capability Indices, Process Capability Analysis, Quality improvement, Statistical Quality Control