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This case contains four practice problems to help develop student understanding of process capability.
Excerpt
UVA-OM-1492
Rev. Mar. 18, 2013
PROCESS CAPABILITY: PRACTICE PROBLEMS
1. A supplier makes packaging cartons for a customer, with a length normally distributed around a mean of 150 mm. Due to the cavity in the filling machine, the carton must be no longer than 157 mm and no shorter than 143 mm. The process standard deviation is 2.5mm.
a. What is the process capability (Cp)?
b. Use NORMSDIST in Excel to calculate the percent defects of the process.
. . .