User`s manual

Non-Conforming Units (p)
-
The formula for calculating the fraction of non-conforming
(defective) units @) in a sample is:
P=
number of non-conforming unirs
n
p Bar
The formula for calculating the mean of a series of “p”
values is:
k
c
h
X Pi)
p = ‘-’ k
c
ni
i=l
Process Capability (Cp) and Inverse (Cr)
The formulas for calculating the capability of a process
(Cp), and its inverse (Cr), are:
60
cr = (USL-LSL)
C-4