Historically, a theoretical framework has been established to judge whether a process is capable or not. These studies, called process capability studies, have received both positive and negative comments. Both researchers and practitioners have indicated that the concept of process capability...

For non‐normal Pearsonian processes, Clements proposed a method for calculating estimators of the two basic process capability indices C p and C pk . Pearn and Kotz applied Clements’ method to obtain estimators for the other two more advanced process capability indices C pm and C pmk . Their...