Question 1

Use Table G.1 for the following question. What is the acceptance number of a single-sampling plan if n = 400, AQL = 0.002, and α= 0.01?

Accepted Answer

A)  c = 0 
B)  c = 1 
C)  c = 2 
D)  c = 3 
A)  c = 0 
B)  c = 1 
C)  c = 2 
D)  c = 3 D

Question 2

A sequential sampling plan generally lowers the ANI.

Accepted Answer

A) True 
 B)False  True

Question 3

Which one of the following alternatives will reduce the consumer's risk for a given AQL and LTPD?

Accepted Answer

A)  Reduce n and keep c constant. 
B)  Increase n and keep c constant. 
C)  Reduce n and increase c. 
D)  Increase beta. 
A)  Reduce n and keep c constant. 
B)  Increase n and keep c constant. 
C)  Reduce n and increase c. 
D)  Increase beta. B

Question 4

This OC curve represents a sampling plan developed for a lot size of 1,000, 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 0.25?

Accepted Answer

A)  less than 0.045 
B)  greater than or equal to 0.045 but less than 0.055 
C)  greater than or equal to 0.055 but less than 0.065 
D)  greater than or equal to 0.065 
A)  less than 0.045 
B)  greater than or equal to 0.045 but less than 0.055 
C)  greater than or equal to 0.055 but less than 0.065 
D)  greater than or equal to 0.065

Question 5

Champion Cooling Company has developed a sampling plan calling for a sample size of 25 and an acceptance number of 1. The proportion defective and probability of acceptance appear in the table. Floyd Electric, their supplier ships whatever Champion Cooling asks; sometimes the lot size is as small as 30 units and it has been as large as 10,000 units. Champion Cooling decides to stick with what they know, a sample size of 25 and an acceptance number of 1 despite advice to the contrary. Which statement regarding their sampling plan is best?

Accepted Answer

A)  The average outgoing quality level will remain constant since the sample size and the acceptance number do not change. 
B)  The average outgoing quality level will vary as the lot size varies, but the average outgoing quality limit will remain constant. 
C)  The incoming fraction defective that produces the average outgoing quality limit will remain the same regardless of lot size. 
D)  The incoming fraction defective that produces the average outgoing quality limit will vary as the lot size varies. 
A)  The average outgoing quality level will remain constant since the sample size and the acceptance number do not change. 
B)  The average outgoing quality level will vary as the lot size varies, but the average outgoing quality limit will remain constant. 
C)  The incoming fraction defective that produces the average outgoing quality limit will remain the same regardless of lot size. 
D)  The incoming fraction defective that produces the average outgoing quality limit will vary as the lot size varies.

Question 6

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 G.1 is appended to this exam.

Accepted Answer

A)  less than or equal to 25 
B)  more than 25 but less than or equal to 175 
C)  more than 175 but less than or equal to 325 
D)  more than 325 
A)  less than or equal to 25 
B)  more than 25 but less than or equal to 175 
C)  more than 175 but less than or equal to 325 
D)  more than 325

Question 7

A lot of 2,000 items has just arrived. A single sampling calls for a sample size of 100 and c = 3. What is the average outgoing quality limit, assuming that all defectives in the entire lot are replaced if it is rejected and all defectives are replaced in the sample if it is accepted? Table G.1 is appended to this exam.

Accepted Answer

A)  less than or equal to 0.0150 
B)  greater than 0.0150 but less than or equal to 0.0175 
C)  greater than 0.0175 but less than or equal to 0.0200 
D)  greater than 0.0200 
A)  less than or equal to 0.0150 
B)  greater than 0.0150 but less than or equal to 0.0175 
C)  greater than 0.0175 but less than or equal to 0.0200 
D)  greater than 0.0200

Question 8

Discuss producer's risk and consumer's risk.

Accepted Answer

Producer's risk is the chance that good

Question 9

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

Accepted Answer

A)  convicting an innocent defendant 
B)  returning your "dead" stereo for warranty repair when its malfunction was caused by it not being plugged in 
C)  halting production to adjust a machine when your process was actually in control 
D)  eating food that has spoiled 
A)  convicting an innocent defendant 
B)  returning your "dead" stereo for warranty repair when its malfunction was caused by it not being plugged in 
C)  halting production to adjust a machine when your process was actually in control 
D)  eating food that has spoiled

Question 10

For a given AQL and LTPD, which one of the following statements about the single-sampling plan is True?

Accepted Answer

A)  If c stays constant but n is increased, both the producer's risk and the consumer's risk will increase. 
B)  If c stays constant but n is increased, both the producer's risk and the consumer's risk will decrease. 
C)  If n stays constant but c is increased, the producer's risk will decrease and the consumer's risk will increase. 
D)  If n stays constant but c is increased, the producer's risk will increase and the consumer's risk will decrease. 
A)  If c stays constant but n is increased, both the producer's risk and the consumer's risk will increase. 
B)  If c stays constant but n is increased, both the producer's risk and the consumer's risk will decrease. 
C)  If n stays constant but c is increased, the producer's risk will decrease and the consumer's risk will increase. 
D)  If n stays constant but c is increased, the producer's risk will increase and the consumer's risk will decrease.

Question 11

Which of the following statements is True?

Accepted Answer

A)  Sequential-sampling plans are preferred to single-sampling plans because the average number of items inspected is generally lower. 
B)  With a sequential-sampling plan, each time an item is inspected, a decision is made to accept or reject a lot. 
C)  With a sequential-sampling plan, sampling continues until the lot is rejected. 
D)  Sequential-sampling plans are defined by four parameters: n₁, n₂, c₁, c₂. 
A)  Sequential-sampling plans are preferred to single-sampling plans because the average number of items inspected is generally lower. 
B)  With a sequential-sampling plan, each time an item is inspected, a decision is made to accept or reject a lot. 
C)  With a sequential-sampling plan, sampling continues until the lot is rejected. 
D)  Sequential-sampling plans are defined by four parameters: n₁, n₂, c₁, c₂.

Question 12

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 G.1 is appended to this exam.

Accepted Answer

A)  n = 54, c = 3 
B)  n = 100, c = 2 
C)  n = 200, c = 1 
D)  n = 162, c = 0 
A)  n = 54, c = 3 
B)  n = 100, c = 2 
C)  n = 200, c = 1 
D)  n = 162, c = 0

Question 13

A quality manager has established a sampling plan that calls for a sample size of 75 units and an acceptance number of 2. The supplier has agreed to a contract that calls for an AQL of 0.02 and an LTPD of .04. What is the AOQL? Table G.1 is appended to this exam.

Accepted Answer

A)  less than 0.11 
B)  between 0.11 and 0.14 
C)  between 0.14 and 0.17 
D)  greater than 0.17 
A)  less than 0.11 
B)  between 0.11 and 0.14 
C)  between 0.14 and 0.17 
D)  greater than 0.17

Question 14

Lot tolerance proportion defective (LTPD) can be defined as the:

Accepted Answer

A)  quality level desired by the consumer. 
B)  worst quality level the consumer can tolerate. 
C)  probability of rejecting a good lot (i.e., when a lot is, in fact, acceptable to the consumer). 
D)  probability of accepting a bad lot (i.e., when a lot is, in fact, not acceptable to the consumer). 
A)  quality level desired by the consumer. 
B)  worst quality level the consumer can tolerate. 
C)  probability of rejecting a good lot (i.e., when a lot is, in fact, acceptable to the consumer). 
D)  probability of accepting a bad lot (i.e., when a lot is, in fact, not acceptable to the consumer).

Question 15

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?

Accepted Answer

A)  α increases 
B)  α decreases 
C)  β increases 
D)  α and β increase 
A)  α increases 
B)  α decreases 
C)  β increases 
D)  α and β increase

Question 16

Relative to an acceptance sampling plan, what is the net effect of increasing n while holding c constant?

Accepted Answer

The producer's risk

Question 17

A single-sampling plan has n = 200 and c = 6. A sample is taken and five items are found to be defective. What should be done?

Accepted Answer

A)  Another sample should be taken. 
B)  The lot should be rejected. 
C)  The lot should be accepted. 
D)  The five items should be repaired, and then the entire lot should be accepted. 
A)  Another sample should be taken. 
B)  The lot should be rejected. 
C)  The lot should be accepted. 
D)  The five items should be repaired, and then the entire lot should be accepted.

Question 18

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. What is the value of β? Table G.1 is appended to this exam.

Accepted Answer

A)  less than or equal to 0.05 
B)  greater than 0.05 but less than or equal to 0.10 
C)  greater than 0.10 but less than or equal to 0.15 
D)  greater than 0.15 
A)  less than or equal to 0.05 
B)  greater than 0.05 but less than or equal to 0.10 
C)  greater than 0.10 but less than or equal to 0.15 
D)  greater than 0.15

Question 19

Which one of the following alternatives will reduce the producer's risk for a given AQL and LTPD?

Accepted Answer

A)  Reduce n and keep c constant. 
B)  Increase n and keep c constant. 
C)  Increase n and reduce c. 
D)  Increase alpha. 
A)  Reduce n and keep c constant. 
B)  Increase n and keep c constant. 
C)  Increase n and reduce c. 
D)  Increase alpha.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 24: Supplement G Acceptance Sampling Plans

Use Table G.1 for the following question. What is the acceptance number of a single-sampling plan if n = 400, AQL = 0.002, and α= 0.01?

A sequential sampling plan generally lowers the ANI.

Which one of the following alternatives will reduce the consumer's risk for a given AQL and LTPD?

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 G.1 is appended to this exam.

Discuss producer's risk and consumer's risk.

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

For a given AQL and LTPD, which one of the following statements about the single-sampling plan is True?

Which of the following statements is True?

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 G.1 is appended to this exam.

A quality manager has established a sampling plan that calls for a sample size of 75 units and an acceptance number of 2. The supplier has agreed to a contract that calls for an AQL of 0.02 and an LTPD of .04. What is the AOQL? Table G.1 is appended to this exam.

Lot tolerance proportion defective (LTPD) can be defined as the:

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?

Relative to an acceptance sampling plan, what is the net effect of increasing n while holding c constant?

A single-sampling plan has n = 200 and c = 6. A sample is taken and five items are found to be defective. What should be done?

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. What is the value of β? Table G.1 is appended to this exam.

Which one of the following alternatives will reduce the producer's risk for a given AQL and LTPD?

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

Using Operations to Create Value

Process Strategy and Analysis

Quality and Performance

Capacity Planning

Constraint Management

Lean Systems

Project Management

Forecasting

Inventory Management

Operations Planning and Scheduling

Resource Planning

Supply Chain Design

Supply Chain Logistic Networks

Supply Chain Integration

Supply Chain Sustainability

Supplement A Decision Making

Supplement J Operations Scheduling

Supplement K Layout

Supplement B Waiting Lines

Supplement C Special Inventory Models

Supplement D Linear Programming

Supplement E Simulation

Supplement F Financial Analysis

Supplement H Measuring Output Rates

Supplement I Learning Curve Analysis

Filters