Variation is present everywhere in our lives. It is assumed that as variation is reduced, quality is improved. In current scenario, specifications for products have been tightened due to performance competition in market. Statistical tools like control charts, process capability analysis and cause and effect diagram ensure that processes are fit for company specifications while reduce the process variation and important in achieving product quality characteristic. Process capability indices (PCIs) are used in the manufacturing industry to provide numerical measures on whether a process is capable of producing items within the predetermined specification limits. This study focuses on process capability analysis turning operation. For the analysis purpose MINITAB 16.0 is used and is found that the process is placed exactly at the centre of the control limits. Analysis also shows that
process is not adequate. The cause and effect diagram is prepared to found out the root cause of variation in diameter of work.
Cause and Effect Diagram, CNC Turning Center, Control Charts, Process Capability, Process Capability Indices (Cp and Cpk), Standard Deviation, Variability