Definicja process capability index

Co znaczy PROCESS CAPABILITY INDEX:

Statistic for the valuation of the capability of a process to produce consistent quality.

If the tolerance range of a characteristic is limited on one or both sides, you can calculate and display the capability indices "cp" and "cpk" in the mean value and qualitative tracks of a control chart.

"Cp" is a measure of the smallest possible fraction of nonconforming units in the process, which occurs if there is an optimal distribution of characteristic values (centralized production). The statistic does not confirm whether this is the case. "Cpk" is a measure of the expected fraction of nonconforming units in the process. The larger the index, the smaller this fraction.