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Auto Pistons at Wemming Chung's plant in Shanghai are produuced in a forging process, and the diameter is a critcal factor that must be controlled.
Auto Pistons at Wemming Chung's plant in Shanghai are produuced in a forging process, and the diameter is a critcal factor that must be controlled. From sample sizes of 10 pistons produced wach day, the mean and the range of this diameter have been as follows:
factor that must be controlled. From sample sizes of 10 piston Need to know how to do:
UCL for x
LCL for x
UCL for R
LCL for R
D4
D5 
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Operations Management
Authors: William J Stevenson, Mehran Hojati
4th Canadian edition
978-1259270154, 1259270157, 978-0071091428
