Resumo:
The Cpk, Cpm and Cpmk indices was originally created to measure the ability of the processes to
produce products meeting specifications but, more recently, they have also been used to control
processes. In these new applications of the Cpk, Cpm and Cpmk indices, the specification limits
are no longer limits that decide whether the item is conforming or nonconforming, they are
tunning parameters that increase or decrease the speed with the control charts signal process
changes in the mean and/or the variance. Therefore, this research proposes the use of control
charts using the three process capability indices as an alternative to the traditional charts 𝑋̅ e R
Through the Monte Carlo simulation, it was that the Cpk, Cpm and Cpmk control charts are great
alternatives to the use of the joint 𝑋̅ and R charts, due they signal faster mean shifts, variance
increases, and also combined mean shifts with variance increases.
