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4.
Process Modeling
4.6. Case Studies in Process Modeling 4.6.2. Alaska Pipeline
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| Description of Data Collection |
The Alaska pipeline data consists of in-field ultrasonic
measurements of the depth of defects in the Alaska pipeline.
The depth of the defects were then remeasured in the laboratory.
These measurements were performed in six different batches.
The data were analyzed to calibrate the bias of the in-field measurements relative to the laboratory measurements. In this analysis, the in-field measurements are the response variable and the laboratory measurements are the factor variable. This data was provided by Harry Berger, who was at the time a scientist for the Office of the Director of the Institute of Materials Research (now the Materials Science and Engineering Laboratory) of NIST. This data was used for a study conducted for the Materials Transportation Bureau of the U.S. Department of Transportation. |
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| Resulting Data |
In-field In-lab Batch
Defect Defect
Size Size
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18 20.2 1
38 56.0 1
15 12.5 1
20 21.2 1
18 15.5 1
36 39.0 1
20 21.0 1
43 38.2 1
45 55.6 1
65 81.9 1
43 39.5 1
38 56.4 1
33 40.5 1
10 14.3 1
50 81.5 1
10 13.7 1
50 81.5 1
15 20.5 1
53 56.0 1
60 80.7 2
18 20.0 2
38 56.5 2
15 12.1 2
20 19.6 2
18 15.5 2
36 38.8 2
20 19.5 2
43 38.0 2
45 55.0 2
65 80.0 2
43 38.5 2
38 55.8 2
33 38.8 2
10 12.5 2
50 80.4 2
10 12.7 2
50 80.9 2
15 20.5 2
53 55.0 2
15 19.0 3
37 55.5 3
15 12.3 3
18 18.4 3
11 11.5 3
35 38.0 3
20 18.5 3
40 38.0 3
50 55.3 3
36 38.7 3
50 54.5 3
38 38.0 3
10 12.0 3
75 81.7 3
10 11.5 3
85 80.0 3
13 18.3 3
50 55.3 3
58 80.2 3
58 80.7 3
48 55.8 4
12 15.0 4
63 81.0 4
10 12.0 4
63 81.4 4
13 12.5 4
28 38.2 4
35 54.2 4
63 79.3 4
13 18.2 4
45 55.5 4
9 11.4 4
20 19.5 4
18 15.5 4
35 37.5 4
20 19.5 4
38 37.5 4
50 55.5 4
70 80.0 4
40 37.5 4
21 15.5 5
19 23.7 5
10 9.8 5
33 40.8 5
16 17.5 5
5 4.3 5
32 36.5 5
23 26.3 5
30 30.4 5
45 50.2 5
33 30.1 5
25 25.5 5
12 13.8 5
53 58.9 5
36 40.0 5
5 6.0 5
63 72.5 5
43 38.8 5
25 19.4 5
73 81.5 5
45 77.4 5
52 54.6 6
9 6.8 6
30 32.6 6
22 19.8 6
56 58.8 6
15 12.9 6
45 49.0 6
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