Standard Deviation

The standard deviation (SD) is a numerical value that expresses the degree of dispersion of statistical values and random variables.
It is also called SD, and the standard deviation symbol is σ (sigma).
It is also said to be the numerical value of volatility due to data.
Use this mathematical standard deviation calculation online to find the given number of values, variance, standard deviation.

Ppk

Process capability is measured using process performance index Pp and PPK.
The process performance index measures whether the result generated by the process satisfies the requirements of the customer.
Please check Ps and PPK with LSL, USL, SD and average with this calculator.