*************Infection rates among ICU patients***********

| September 12, 2019


Q1-
 A sample of five units of product is taken from a production process every hour. The results in Table are obtained. Assume that the specifications on this quality characteristic are at 10.015 and 10.035. Set up a control chart to monitor the tool wear? What is your conclusion? (100 points)

Sample No.XbarR
110.020.008
210.0220.009
310.0250.006
410.0280.007
510.0290.005
610.0320.006
710.0180.005
810.0210.006
910.0240.005
1010.0260.008
1110.0290.005
1210.0310.007

Answer:

Q2 – The data shown in Table from a production process with two CTQs, X1, and X2. The sample data are sample means of X1 and X2 (Sample size =25, Assume that mean values of the quality characteristics and the covariance matrix were computed from 50 preliminary Samples=50). Construct T2 control chart using these data for Phase (I)(100 points)

Answer:

Q3 – Explain the shortcomings of control ellipse in Multivariate Monitoring Chart? (50 points)

Answer:

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