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5
23
21
25
6
39
22
21
7
18
23
23
8
24
24
20
9
20
25
24
10
22
26
28
11
19
27
21
12
23
28
19
13
22
29
15
14
29
30
22
15
17
31
24
16
16
32
16
95. Construct a flowchart that illustrates the decision process for selecting the appropriate control chart(s) for monitoring a
given process.
96. A quality engineer took 40 samples of 100 transistors each from the output of an assembly line. Each transistor was
tested, and the number of defectives in each sample is recorded in the table that follows. Determine the control chart limits
for a p-chart.
Sample
Number Defective
Sample
Number Defective
1
3
21
1
2
2
22
2
3
1
23
2
4
4
24
3
5
0
25
4
6
2
26
1
7
0
27
2
8
5
28
4
9
1
29
0
10
2
30
4
11
2
31
3
12
1
32
2
13
3
33
4
14
3
34
2
15
4
35
1
16
5
36
1
17
3
37
3
18
3
38
4
19
1
39
4
20
8
40
2
97. A specification is 50.0 cm ± 10.0 cm. Sketch and label the pre-control zones for this specification. Include the
following values on your sketch: nominal, upper and lower specification limits, and end points of the green zone.
98. Discuss the differences between attributes and variables measurement.
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Answer Key
1. False
2. True
3. True
4. False
5. True
6. True
7. True
8. True
9. False
10. True
11. False
12. False
13. False
14. False
15. True
16. True
17. True
18. True
19. True
20. True
21. False
22. False
23. True
24. True
25. False
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52. b
53. b
54. b
55. c
56. c
57. c
58. c
59. a
60. d
61. c
62. c
63. c
64. b
65. c
66. c
67. d
68. d
69. b
70. b
71. b
72. a
73. d
74. c
75. b
76. c
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96. = = (3/100 + 2/100 + 1/100 + 4/100 + … + 2/100)/40 = 0.0255
UCLp = + = 0.0255 + = 0.0728
Center line = = 0.0255
LCLp = – = 0.0255 – 0.0473 = –0.0218, so use 0.
97.
Red
zone
Yellow
zone
Green
zone
Yellow
zone
Red
zone
40.0
LSL
45.0
50.0
Nominal
55.0
60.0
USL
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