Exam 19: Acceptance Sampling Plans

A single-sampling plan using a sample size of 50 has the following performance: If the plan is used on a lot of 2,000 items,what is the average outgoing quality limit?

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Question 1

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The AOQ is often lower for a supplier with a high fraction defective than for a supplier with a comparatively lower fraction defective.Why wouldn't a supplier with a lower fraction defective always have a better AOQ?

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Question 2

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Average outgoing quality is based on the probability of accepting a lot with a certain fraction defective,given a sample (and lot)size.If a supplier has a very small fraction defective,it is unlikely that the inspection sample contains any defectives,so the lot will be accepted.A supplier with a much higher fraction defective will produce lots that trigger 100% inspection,resulting in more defective product being weeded out and a better AOQ.

An item is purchased with one surface polished to a specified finish quality.From each incoming shipment,a sample of items is randomly selected and the polished surface of each sample item is compared with a standard and judged to be either acceptable or unacceptable.The following parameters have been established: AQL = 0.02,= 0.05,LTPD = 0.09,and = 0.10.Table I.1 is appended to this exam.What are the sample size and the acceptance number?

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Question 3

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The management of a company wishes to develop a new acceptance sampling plan that keeps acceptable quality level,lot tolerance proportion defective,and c constant.If the sample size (n)is increased,compared to the prior plan,which of the following is TRUE?

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Question 4

If the sample size is increased and the acceptance level is unchanged,the OC curve will have a higher consumer's risk.

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Question 5

Which of the following statements is TRUE?

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Question 6

Increasing c while holding n constant decreases the producer's risk and increases the consumer's risk.

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Question 7

Use Table I.1 for the following question.What is the acceptance number of a single-sampling plan if n = 300,LPTD = 0.02,and β = 0.15?

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Question 8

Discuss the two incorrect conclusions that can be made when using acceptance sampling.

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Question 9

A rectified inspection plan requires that

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Question 10

This OC curve represents a sampling plan developed for a lot size of 500,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What is the average outgoing quality for an incoming fraction defective of 0.15? $This OC curve represents a sampling plan developed for a lot size of 500,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What is the average outgoing quality for an incoming fraction defective of 0.15?$

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Question 11

This OC curve represents a sampling plan developed for a lot size of 500,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What is the average outgoing quality limit?

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Question 12

A small ________ can be disregarded in AOQ calculations involving an extremely large lot size.

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Question 13

A manufacturer wants a sampling plan in which AQL = 0.02,LPTD = 0.12,α = 0.05,and β = 0.10.Which of the following values for n and c best satisfy these specifications? Table I.1 is appended to this exam.

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Question 14

Lot tolerance proportion defective (LTPD)can be defined as

(Multiple Choice)

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Question 15

A sample of 100 items is randomly selected from a shipment of incoming materials.AQL and LTPD have been established at 0.01 and 0.07,respectively.When four or more defective items are found in a sample,the shipment is rejected.Table I.1 is appended to this exam.What is the value of β?

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Question 16

The maximum value of the average outgoing quality over all possible values of the proportion defective is called the ________.

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Question 17

Which of the following is an example of a type II error?

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Question 18

A double-sampling plan has a lower ________ than a single-sampling plan.

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Question 19

A company is developing an acceptance sampling plan to monitor quality.The acceptable quality level (AQL)is 0.01,and a sampling plan having c = 5 is being considered.If a producer's risk of 0.03 is desired,what should be the sample size? Table I.1 is appended to this exam.

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Question 20

Showing 1 - 20 of 71

A single-sampling plan using a sample size of 50 has the following performance: If the plan is used on a lot of 2,000 items,what is the average outgoing quality limit?

The AOQ is often lower for a supplier with a high fraction defective than for a supplier with a comparatively lower fraction defective.Why wouldn't a supplier with a lower fraction defective always have a better AOQ?

The management of a company wishes to develop a new acceptance sampling plan that keeps acceptable quality level,lot tolerance proportion defective,and c constant.If the sample size (n)is increased,compared to the prior plan,which of the following is TRUE?

If the sample size is increased and the acceptance level is unchanged,the OC curve will have a higher consumer's risk.

Which of the following statements is TRUE?

Increasing c while holding n constant decreases the producer's risk and increases the consumer's risk.

Use Table I.1 for the following question.What is the acceptance number of a single-sampling plan if n = 300,LPTD = 0.02,and β = 0.15?

Discuss the two incorrect conclusions that can be made when using acceptance sampling.

A rectified inspection plan requires that

This OC curve represents a sampling plan developed for a lot size of 500,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What is the average outgoing quality limit?

A small ________ can be disregarded in AOQ calculations involving an extremely large lot size.

A manufacturer wants a sampling plan in which AQL = 0.02,LPTD = 0.12,α = 0.05,and β = 0.10.Which of the following values for n and c best satisfy these specifications? Table I.1 is appended to this exam.

Lot tolerance proportion defective (LTPD)can be defined as

A sample of 100 items is randomly selected from a shipment of incoming materials.AQL and LTPD have been established at 0.01 and 0.07,respectively.When four or more defective items are found in a sample,the shipment is rejected.Table I.1 is appended to this exam.What is the value of β?

The maximum value of the average outgoing quality over all possible values of the proportion defective is called the ________.

Which of the following is an example of a type II error?

A double-sampling plan has a lower ________ than a single-sampling plan.

A company is developing an acceptance sampling plan to monitor quality.The acceptable quality level (AQL)is 0.01,and a sampling plan having c = 5 is being considered.If a producer's risk of 0.03 is desired,what should be the sample size? Table I.1 is appended to this exam.

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