It is a fact that no two products are exactly alike because of slight differences in
materials, workers, machines, tools and other factors. These are called common
or random causes of variation. Common causes of variation are based on random
causes that we cannot identify. The combination of Cp
and Cpk is used extensively
because it shows both the potential process capabilities. The Process Capability
Ratio (PCR) and Process Capability Index (Cpk) for a kick starter gear drive (depth
of pitch problem) were computed after stabilizing the manufacturing process.
Data were taken from the manufacturing process and the X and R control charts
were plotted to find whether the processes are within statistical control or out of
statistical control. The process capability analysis was done to find out the
effectiveness of the processes. It was found that 0.465% of kick starter gear due to
depth of pitch was beyond the control limits, which is really a major concern for
the industry.