Large-scale integrated (LSI) circuit chips are made in one department of an electronics firm. These chips are incorporated into analog devices that are then encased in epoxy. The yield is not particularly good for LSI manufacture, so the AQL specified by that department is 9% while the LTPD acceptable by the assembly department is 32%. Assume the company is willing to accept a consumer's risk of 10 percent and a producer's risk of 5 percent. a. Find the sample size. Use Exhibit 10.16. Note: if the exact value of the computed LTPD/AOQ ratio does not appear in Exhibit 10.16, use the next higher ratio. (Round up your answer to the next whole number.) Sample size b. How would you tell someone to do the test? Randomly sample LSI using the sample size from part a, the lot if more than defective.
Large-scale integrated (LSI) circuit chips are made in one department of an electronics firm. These chips are incorporated into analog devices that are then encased in epoxy. The yield is not particularly good for LSI manufacture, so the AQL specified by that department is 9% while the LTPD acceptable by the assembly department is 32%. Assume the company is willing to accept a consumer's risk of 10 percent and a producer's risk of 5 percent. a. Find the sample size. Use Exhibit 10.16. Note: if the exact value of the computed LTPD/AOQ ratio does not appear in Exhibit 10.16, use the next higher ratio. (Round up your answer to the next whole number.) Sample size b. How would you tell someone to do the test? Randomly sample LSI using the sample size from part a, the lot if more than defective.
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Transcribed Image Text:exhibit 10.16
Excerpt from a Sampling Plan Table for a = 0.05, B= 0.10
LTPD/AQL
n* AQL
LTPD/AQL
n * AQL
44.890
0.052
3.549
2.613
10.946
0.355
9.
3.206
3.286
6.509
0.818
2.957
3.981
3.
4.890
1.366
8.
2.768
4.695
4.057
1.970
9.
2.618
5.426
4.

Transcribed Image Text:Large-scale integrated (LSI) circuit chips are made in one department of an electronics firm. These chips are incorporated into analog
devices that are then encased in epoxy. The yield is not particularly good for LSI manufacture, so the AQL specified by that department
is 9% while the LTPD acceptable by the assembly department is 32%. ASsume the company is willing to accept a consumer's risk of 10
percent and a producer's risk of 5 percent.
a. Find the sample size. Use Exhibit 1016. Note: if the exact value of the computed LTPD/AOQ ratio does not appear in Exhibit 10.16,
use the next higher ratio. (Round up your answer to the next whole number.)
Sample size
b. How would you tell someone to do the test?
Randomly sample LSI using the sample size from part a,
the lot if more than
defective.
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