q1 a sample of five units of product is taken from a production process every hour
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. |
Xbar |
R |
|
1 |
10.02 |
0.008 |
|
2 |
10.022 |
0.009 |
|
3 |
10.025 |
0.006 |
|
4 |
10.028 |
0.007 |
|
5 |
10.029 |
0.005 |
|
6 |
10.032 |
0.006 |
|
7 |
10.018 |
0.005 |
|
8 |
10.021 |
0.006 |
|
9 |
10.024 |
0.005 |
|
10 |
10.026 |
0.008 |
|
11 |
10.029 |
0.005 |
|
12 |
10.031 |
0.007 |
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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