Problem 4:

A new contract was written with Company B with the following stipulations:

Cpk =

1.1, Specification Nominal (N) = 10 ±

0.3 mils.

Company B wants to design their process by setting the process average =

10 mils and the sample size (n) =

50. Find:

Xdouble bar:

UCLX:

LCLX:

LCLr:

Rbar:

Reject Rate:

UCLr:

ppm