The capability analysis can be separated to two views:
Short term (Process capability)
Long term (Process performance)
Each view will be separated to two cases:
The short term estimate consists of Process capability and Process capability index, use Cp and Cpk, respectively.
The long term estimate consists of Process performance and Process performance index use Pp and Ppk, respectively.
Remark: In Minitab, the Pp and Ppk will be grouped and shown in overall
category, whereas the Cp and Cpk will be grouped and shown in within
category.