运营管理考题目库krajewskiom9tifSuppG.docx

1、运营管理考题目库krajewskiom9tifSuppGSupplementGAcceptance Sampling PlansTRUE/FALSE1. Acceptance sampling is an inspection procedure used to determine whether to accept or reject a specific quantity of material.Answer: TrueReference: IntroductionDifficulty: EasyKeywords: acceptance sampling, accept reject2.

2、As more firms initiate total quality management systems, the need for acceptance sampling will increase.Answer: FalseReference: IntroductionDifficulty: EasyKeywords: acceptance sampling3. The lot tolerance proportion defective (LTPD) is the customers desired level of quality.Answer: FalseReference:

3、Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: lot tolerance, proportion defective, LTPD4. A sequential sampling plan generally lowers the ANI.Answer: TrueReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: sequential sampling, average number inspected, ANI5.

4、An operating characteristic curve is a plot of the probability of accepting the lot against the proportion defectives.Answer: TrueReference: Operating Characteristic CurvesDifficulty: ModerateKeywords: OC operating characteristic, probability, proportion6. The distance between 1.0 and where the AQL

5、intersects the OC curve is the value (Beta).Answer: FalseReference: Operating Characteristic CurvesDifficulty: ModerateKeywords: OC, operating characteristic, probability, Beta, AQL7. Increasing c while holding n constant decreases the producers risk and increases the consumers risk.Answer: TrueRefe

6、rence: Operating Characteristic CurvesDifficulty: ModerateKeywords: OC operating, characteristic, producer risk, consumer risk8. If the sample size is increased and the acceptance level is unchanged, the OC curve will have a higher consumers risk.Answer: FalseReference: Average Outgoing QualityDiffi

7、culty: ModerateKeywords: sample size, acceptance level, consumers risk, OC9. Rectified inspection occurs when all defective items in the lot are replaced with good items if the lot is rejected and any defective items in the samples are replaced if the lot is accepted.Answer: TrueReference: Average O

8、utgoing QualityDifficulty: ModerateKeywords: rectified inspectionMULTIPLE CHOICE10. Acceptable quality level can be defined as the: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, accepta

9、ble to the consumer). d. probability of accepting a bad lot (i.e., when a lot is, in fact, not acceptable to the consumer). Answer: aReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: AQL, acceptable quality level11. Which of the following is an example of a type I error?a. B

10、uying a carton of eggs at the store and discovering that one was brokenb. Releasing a guilty defendantc. Returning your computer for warranty repair when the fault was caused by user errord. Passing defective materials from a supplier into your processes to keep your workers busyAnswer: cReference:

11、Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: type I error, producer risk, alpha12. Which of the following is an example of a type II error?a. Convicting an innocent defendantb. Returning your “dead” stereo for warranty repair when its malfunction was caused by it not being plugged

12、 inc. Halting production to adjust a machine when your process was actually in controld. Eating food that has spoiledAnswer: dReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: type II error, consumer risk, beta13. Lot tolerance proportion defective (LTPD) can be defined as:

13、a. the quality level desired by the consumer. b. the worst quality level the consumer can tolerate. c. the probability of rejecting a good lot (i.e., when a lot is, in fact, acceptable to the consumer). d. the probability of accepting a bad lot (i.e., when a lot is, in fact, not acceptable to the co

14、nsumer). Answer: bReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: LTPD, lot tolerance percent defective14. 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. Another sample should be taken. b. Th

15、e 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. Answer: cReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: single sampling plan15. A double-sampling plan has n1 = 50, n2 = 100, c1 = 2,

16、 and c2 = 4. Suppose on the first sample, one defective item was discovered. What should be done? a. Reject the entire lot. b. Take a second sample of 100 units. c. Accept the entire lot. d. Repair the defective units, and accept the entire lot. Answer: cReference: Acceptance Sampling Plan Decisions

17、Difficulty: ModerateKeywords: double sampling plan16. A double-sampling plan has n1 = 50, n2 = 100, c1 = 2, and c2 = 4. Suppose on the first sample, five defectives were discovered. How many total items will be inspected before a decision is reached? a. 50b. 100c. 150d. This cannot be determined wit

18、h the information provided.Answer: aReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: double sampling plan17. A double-sampling plan has n1 = 50, n2 = 100, c1 = 2, and c2 = 4. Suppose the first sample revealed two defectives. What should be done? a. Reject the entire lot. b.

19、 Take a second sampling of 100 units. c. Accept the entire lot. d. Repeat the tests on the first sample. Answer: cReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: double sampling plan18. Which of the following statements is TRUE? a. Sequential-sampling plans are preferred t

20、o 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-

21、sampling plans are defined by four parameters: n1, n2, c1, c2. Answer: aReference: Acceptance Sampling Plan DecisionsDifficulty: ModerateKeywords: sequential sampling plan19. For a given AQL and LTPD, which one of the following statements about the single-sampling plan is TRUE? a. If c stays constan

22、t but n is increased, both the producers risk and the consumers risk will increase. b. If c stays constant but n is increased, both the producers risk and the consumers risk will decrease. c. If n stays constant but c is increased, the producers risk will decrease and the consumers risk will increas

23、e. d. If n stays constant but c is increased, the producers risk will increase and the consumers risk will decrease. Answer: cReference: Operating Characteristics CurveDifficulty: HardKeywords: AQL, LTPD, acceptable quality level, lot tolerance percent defective20. Which one of the following will in

24、crease the consumers risk? a. Decrease sample size and hold constant the number of defective items in a sample. b. Decrease the acceptable number of defective items in a sample and hold constant the sample size. c. Increase the sample size and decrease the acceptable number of defective items in a s

25、ample. d. Decrease the acceptable quality level and hold constant both sample size and the acceptable number of defective items in a sample. Answer: aReference: Operating Characteristics CurveDifficulty: HardKeywords: consumer risk, sample size21. Which one of the following alternatives will reduce

26、the consumers risk for a given AQL and LTPD? a. Reduce n and keep c constant. b. Increase n and keep c constant. c. Reduce n and increase c.d. Increase beta. Answer: bReference: Operating Characteristics CurveDifficulty: HardKeywords: AQL, LTPD, acceptable quality level, lot tolerance percent defect

27、ive consumers risk22. Which one of the following alternatives will reduce the producers risk for a given AQL and LTPD? a. Reduce n and keep c constant.b. Increase n and keep c constant. c. Increase n and reduce c. d. Increase alpha. Answer: aReference: Operating Characteristics CurveDifficulty: Hard

28、Keywords: AQL, LTPD, acceptable quality, level, lot tolerance percent defective, producers risk23. Which one of the following actions will decrease the producers risk? a. Increase n and keep c constant. b. Decrease n and keep c constant. c. Keep n constant and decrease c. d. Increase n and decrease

29、c. Answer: bReference: Operating Characteristics CurveDifficulty: HardKeywords: producers risk, sample size, acceptance number24. 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 t

30、he sample size (n) is increased, compared to the prior plan, which of the following is TRUE? a. increasesb. decreases c. increasesd. and increase Answer: aReference: Operating Characteristics CurveDifficulty: HardKeywords: AQL, LTPD, acceptable quality level, lot tolerance percent defective25. The a

31、verage outgoing quality (AOQ) is: a. the average number of good units produced per hour. b. the expected proportion of defects a sampling plan will allow. c. the level of quality desired by the customer. d. the worst level of quality tolerated by the consumer. Answer: bReference: Average Outgoing QualityDifficulty: ModerateKeywords: AOQ, average outgoing quality26. 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 i