Ppk: Calculate Cpk

Description Usage Arguments Value

Description

function to calculate Cpk - "measure of process centering"

Usage

1
Ppk(LSL, USL, QC.Center, s.Sigma)

Arguments

LSL

number, customer's lower specification limit.

USL

number, customer's upper specification limit.

QC.Center

number, the mean or median value determined from an XmR plot or a Studentized (e.g., xBar) analysis.

s.Sigma

number, the sigma value determined from overall standard deviation (i.e., sd()).

Value

numeric, Ppk value (unitless)


kenithgrey/ggQC documentation built on May 20, 2019, 9:04 a.m.