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In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 X¡ = 20.883 R¡ = 3.733 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.

In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 X¡ = 20.883 R¡ = 3.733 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 Xi = 20.883 Ri = 3.733 %3D i=1 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.
Transcribed Image Text:In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 Xi = 20.883 Ri = 3.733 %3D i=1 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.
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