Congratulations you are a college professor teaching SQC!

Show a process capablity problem that meets the following guidelines.

X bar and R Problem

Subgroup size = 6

10 Subgroups

Cp = 1.5

12 % of product is above the upper specification limit

Provide:

Specification Limits

Sum of xbar

Sum of R

A detailed solution of your problem (prove that 12% is above the upper specification limit)

Hint: Get all of the formulas together and work backward, or build a spreadsheet and use trial and error.

Don't provide the observations!