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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 17% while the LTPD acceptable by the assembly department is 47%. 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. Note: 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 17% while the LTPD acceptable by the assembly department is 47%. 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. Note: 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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Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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3 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 17% while the LTPD acceptable by the assembly department is 47%. Assume the company is willing to accept a consumer's risk of 10 percent and a producer's risk of 5 percent. ces 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. Note: 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, S the lot if more than defective.
Transcribed Image Text:3 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 17% while the LTPD acceptable by the assembly department is 47%. Assume the company is willing to accept a consumer's risk of 10 percent and a producer's risk of 5 percent. ces 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. Note: 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, S the lot if more than defective.
es In the past, Alpha Corporation has not performed incoming quality control inspections but has taken the word of its vendors. However, Alpha has been having some unsatisfactory experience recently with the quality of purchased items and wants to set up sampling plans for the receiving department to use. For a particular component, X, Alpha has a lot tolerance percentage defective of 50 percent. Zenon Corporation, from which Alpha purchases this component, has an acceptable quality level in its production facility of 17 percent for component X. Alpha has a consumer's risk of 10 percent, and Zenon has a producer's risk of 5 percent. a. When a shipment of Product X is received from Zenon Corporation, what sample size should the receiving department test? 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. Note: Round up your answer to the next whole number. Sample size b. What is the allowable number of defects in order to accept the shipment? Allowable number of defects
Transcribed Image Text:es In the past, Alpha Corporation has not performed incoming quality control inspections but has taken the word of its vendors. However, Alpha has been having some unsatisfactory experience recently with the quality of purchased items and wants to set up sampling plans for the receiving department to use. For a particular component, X, Alpha has a lot tolerance percentage defective of 50 percent. Zenon Corporation, from which Alpha purchases this component, has an acceptable quality level in its production facility of 17 percent for component X. Alpha has a consumer's risk of 10 percent, and Zenon has a producer's risk of 5 percent. a. When a shipment of Product X is received from Zenon Corporation, what sample size should the receiving department test? 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. Note: Round up your answer to the next whole number. Sample size b. What is the allowable number of defects in order to accept the shipment? Allowable number of defects
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Acceptable Quality Level, (AQL) = 17% = 0.17Lot Tolerance Percent Defective (LTPD) = 47% = 0.47Producer Risk = 5% = 0.05Consumer Risk = 10% = 0.1

 

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