# Calculate Upper And Lower Limits To Determine Process Is In Control

Question

Cartons of Plaster of Paris are supposed to weigh exactly 32 oz. Inspectors want to develop process control charts. They take ten samples of six boxes each and weigh them. Based on the following data, compute the lower and upper control limits and determine whether the process is in control. σ = 1

 Sample Mean Range 1 33.8 1.1 2 34.6 0.3 3 34.7 0.4 4 34.1 0.7 5 34.2 0.3 6 34.3 0.4 7 33.9 0.5 8 34.1 0.8 9 34.2 0.4 10 34.4 0.3

Summary

The question belongs to Operations Management and it discusses about calculation of lower and upper limits to determine whether the process is in control or not.

Total Word Count 158

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