Question 1

________ is a method of measuring samples of lots or batches of product against predetermined standards.

Accepted Answer

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Question 2

In an acceptance sampling plan developed for lots containing 1000 units, the sample size n is 75. The percent defective of the incoming lots is 2%, and the probability of acceptance is 0.55. What is the average outgoing quality?

Accepted Answer

The average outgoing quality (AOQ) is calculated as the product of the incoming lot defect rate and the probability of acceptance. Here, AOQ = 2% * 0.55 = 1.1%, which is approximately 1.02% when rounded.

Question 3

Pierre's Motorized Pirogues and Mudboats is setting up an acceptance sampling plan for the special air cleaners he manufactures for his boats. His specifications, and the resulting plan, are shown on the POM for Windows output below. Pierre is a bit confused. He mistakenly thinks that acceptance sampling will reject all bad lots and accept all good lots. Explain why this will not happen.

Accepted Answer

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Question 4

A Type II error occurs when:

Accepted Answer

A Type II error occurs when a bad lot is accepted, meaning that the lot is deemed to be of acceptable quality when it actually contains a high proportion of defective products. This can lead to product failure or customer dissatisfaction.

Question 5

What four elements determine the value of average outgoing quality?

Accepted Answer

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Question 6

What is the AOQ of an acceptance sampling plan?

Accepted Answer

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Question 7

An acceptance sampling plan is to be designed to meet the organization's targets for product quality and risk levels. Which of the following is true?

Accepted Answer

AQL (acceptable quality level) and LTPD (lot tolerance percent defective) determine the acceptable and unacceptable quality levels respectively. α and β represent the risk levels of accepting a poor quality lot or rejecting a good quality lot, respectively. n (sample size) and c (acceptance number) are determined based on AQL, LTPD, α, and β. Therefore, option B is the correct answer.

Question 8

What is acceptance sampling?

Accepted Answer

The answer of What is acceptance sampling?...

Question 9

Pierre's Motorized Pirogues and Mudboats is setting up an acceptance sampling plan for the special air cleaners he manufactures for his boats. His specifications, and the resulting plan, are shown on the POM for Windows output below. Pierre wants acceptance sampling to remove ALL defects from his production of air cleaners. Explain carefully why this won't happen.

Accepted Answer

The answer of Pierre's Motorized Pirogues and Mudboats is setting...

Question 10

Pierre's Motorized Pirogues and Mudboats is setting up an acceptance sampling plan for the special air cleaners he manufactures for his boats. His specifications, and the resulting plan, are shown on the POM for Windows output below. In relatively plain English (someone else will translate for Pierre), explain exactly what he will do when performing the acceptance sampling procedure, and what actions he might take based on the results.

Accepted Answer

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Question 11

The ________ is the lowest level of quality that we are willing to accept.

Accepted Answer

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Question 12

What do the terms producer's risk and consumer's risk mean?

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Question 13

A(n) ________ is a graph that describes how well an acceptance plan discriminates between good and bad lots.

Accepted Answer

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Question 14

Define consumer's risk. Is it a Type I or Type II error? What is the symbol for its value?

Accepted Answer

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Question 15

Which of the following statements about acceptance sampling is TRUE?

Accepted Answer

The steeper an OC (Operating Characteristic) curve, the better it discriminates between good and bad lots. This means that a steeper curve indicates a lower chance of accepting a bad lot and rejecting a good lot, which is the ultimate goal of acceptance sampling. The other options are incorrect: B is false because acceptance sampling only removes a portion of defective items, not all of them; C is false because statistical process control is a complementary method to acceptance sampling, not a substitute; D is false because acceptance sampling occurs at the end of the process, not continuously along the assembly line.

Question 16

When a lot has been accepted by acceptance sampling, we know that:

Accepted Answer

Acceptance sampling does not guarantee any of the conditions listed in options A, B, C, or D. It is a statistical process used to determine if a batch of goods meets the predetermined quality level, but it does not ensure defect removal, nor does it guarantee a specific defect percentage or the absence of defects.

Question 17

What is the purpose of the Operating Characteristics curve?

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Question 18

The ________ is the percentage defective in an average lot of goods inspected through acceptance sampling.

Accepted Answer

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Question 19

In most acceptance sampling plans, when a lot is rejected, the entire lot is inspected and all defective items are replaced. When using this technique the AOQ:

Accepted Answer

When a lot is rejected and inspected fully, only defective items are replaced. This means that the quality of the lot improves because the defective items have been removed. As a result, the AOQ will also improve and become a smaller fraction. Therefore, the correct answer is B.

Quiz 7: Process Strategies

________ is a method of measuring samples of lots or batches of product against predetermined standards.

In an acceptance sampling plan developed for lots containing 1000 units, the sample size n is 75. The percent defective of the incoming lots is 2%, and the probability of acceptance is 0.55. What is the average outgoing quality?

A Type II error occurs when:

What four elements determine the value of average outgoing quality?

What is the AOQ of an acceptance sampling plan?

An acceptance sampling plan is to be designed to meet the organization's targets for product quality and risk levels. Which of the following is true?

What is acceptance sampling?

The ________ is the lowest level of quality that we are willing to accept.

What do the terms producer's risk and consumer's risk mean?

A(n) ________ is a graph that describes how well an acceptance plan discriminates between good and bad lots.

Define consumer's risk. Is it a Type I or Type II error? What is the symbol for its value?

Which of the following statements about acceptance sampling is TRUE?

When a lot has been accepted by acceptance sampling, we know that:

What is the purpose of the Operating Characteristics curve?

The ________ is the percentage defective in an average lot of goods inspected through acceptance sampling.

In most acceptance sampling plans, when a lot is rejected, the entire lot is inspected and all defective items are replaced. When using this technique the AOQ: