Mylab Operations Management With Pearson Etext -- Access Card -- For Operations Management: Sustainability And Supply Chain Management (13th Edition)
13th Edition
ISBN: 9780135225899
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Chapter 10, Problem 32P
Summary Introduction
To determine: The
Introduction: Sample size is required to determine the number of observations that are necessary to find the true cycle time.
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5. The manager of Asombrado Bounty Office, Charles Badillo, estimates his employees are idle 25%of the time. With that problem, how many work samples are needed to consider within 3%accuracy and have 95.45% confidence level.
6. At ASP Micro Manufacturing, Inc. workers press semiconductor into predrilled slots on printed-circuit boards. Determine the normal time of the operation in seconds. The elemental motions for normal time used by the company are as follows:• Reach 6 inches for semiconductors 10.5 TMU• Grasp the semiconductors 8.0 TMU• Move semiconductor to printed-circuit board 9.5 TMU• Position semiconductor 20.1 TMU• Press semiconductor into slots 20.3 TMU• Move board aside 15.8 TMU
7. The semiconductor used in Costin Calculator has 5 components with the consistency of 90%, 95%,98%, 90%, and 99%, respectively. How reliable is one product of calculator?
An analyst has been asked to prepare an estimate of the proportion of time that a turret lathe operator spends adjusting the machine, with 90% confidence level. Based on previous experience, the analyst believes the proportion will be approximately 30%.
a. If the analyst uses sample size of 400 observations, what is the maximum error that will be associated with the estimate?
b. What sample size would the analyst need in order to have the maximum error be no more than +/- 5%?
erations Management Spring21
Time left 1:09:19
stion
In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken
each having 5 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to
be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and
11.83 respectively. What are the lower and upper control limits for the X-bar chart?
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O a.
None is correct
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O b.
156.55, 170.47
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O C.
144.77, 159.11
O d. 145.40, 190.72
O e. 143.55, 165.47
Of.
142.92, 160.66
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Chapter 10 Solutions
Mylab Operations Management With Pearson Etext -- Access Card -- For Operations Management: Sustainability And Supply Chain Management (13th Edition)
Ch. 10 - Prob. 1DQCh. 10 - Prob. 2DQCh. 10 - Prob. 3DQCh. 10 - Prob. 4DQCh. 10 - Prob. 5DQCh. 10 - Prob. 6DQCh. 10 - Prob. 7DQCh. 10 - Prob. 8DQCh. 10 - Prob. 9DQCh. 10 - Prob. 10DQ
Ch. 10 - Prob. 11DQCh. 10 - Prob. 12DQCh. 10 - Prob. 13DQCh. 10 - Prob. 14DQCh. 10 - Prob. 2PCh. 10 - Draw an activity chart for a machine operator with...Ch. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 1PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 30PCh. 10 - Prob. 31PCh. 10 - Prob. 32PCh. 10 - Prob. 34PCh. 10 - Prob. 35PCh. 10 - Prob. 36PCh. 10 - Prob. 37PCh. 10 - Prob. 33PCh. 10 - Prob. 39PCh. 10 - Prob. 40PCh. 10 - Prob. 41PCh. 10 - Prob. 42PCh. 10 - Prob. 44PCh. 10 - Prob. 1CSCh. 10 - Prob. 2CSCh. 10 - Prob. 3CSCh. 10 - Prob. 4CSCh. 10 - Prob. 2.1VCCh. 10 - Prob. 2.2VCCh. 10 - Prob. 2.3VCCh. 10 - Prob. 2.4VCCh. 10 - Prob. 1.1VCCh. 10 - Prob. 1.2VCCh. 10 - Prob. 1.3VC
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- Bank manager Art Hill wants to determine the percentageof time that tellers are working and idle. He decides touse work sampling, and his initia l estimate is that the tellers a reid le 15% of the time. How many observations should Hill take tobe 95.45% confident that the results wi ll not be more than ± 4%from the true result?arrow_forwardEach year, Lord & Taylor, Ltd., sets up a giftwrapping station to assist its customers with holiday shopping. Preliminary observations of one worker at the stationproduced the following sample time (in minutes per package):3.5, 3.2, 4.1, 3.6, 3.9. Based on this small sample, what number of observations would be necessary to determine the truecycle time with a 95% confidence level and an accuracy of{5%?arrow_forwardA time study has revealed an average observed timeof 5 minutes, with a standard deviation of 1.25 minu tes. Thesefigures are based on a sample of 75 cycles. Is this sample largeenough for analyst Anand Paul to be 99.73% confident that thestandard time is within 5% of the true value?arrow_forward
- Each year, Lord & Taylor, Ltd., sets up a gift-wrappingstation to assist its customers with holiday shopping. Preliminaryobservations of one worker at the sta tion produced the followingsample time (in minutes per package): 3.5, 3.2, 4. 1, 3.6, 3.9.Based on this small sample, what number of observations wouldbe necessa ry to determine the true cycle time with a 95% confidencelevel and an accuracy of ± 5%?arrow_forwardFour samples of three observations each have been taken. Sample 1: 12, 12.3, 11. Sample 2: 12, 12.4, 12. Sample 3: 12, 12, 11. Sample 4: 12, 11.8, 11. LCL and UCL of R-chart are: O a. None of them O b. O and 2.38 O c. -1 and 2.77 O d. Oand 2.12 O e. Oand 2.96arrow_forwardSupervisor Kenneth Peterson wants to detem1ine thepercentage of time a machine in his a rea is idle. He decides to usework sampling, and his initial estimate is that the machine is idle 20%of the time. How many observations should Peterson take to be 98%confident that the results will be Jess than 5% from the true results?arrow_forward
- Work measurement as a source of job standards includes time study and work sampling, but not the use of historical data. Question 17 options: True Falsearrow_forwardSupervisor Kenneth Peterson wants to determinethe percent of time a machine in his area is idle. He decides touse work sampling, and his initial estimate is that the machine isidle 20% of the time. How many observations should Petersontake to be 98% confident that the results will be less than 5% fromthe true results?arrow_forwardRefer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Ross Hopkins is attempting to monitor a filling process that has an overall average of 715 mL. The average range R is 6 mL. For a sample size of 10, the control limits for 3-sigma x chart are: Upper Control Limit (UCL;) = mL (round your response to three decimal places). Lower Control Limit (LCL-) = mL (round your response to three decimal places). The control limits for the 3-sigma R-chart are: Upper Control Limit (UCLR) = mL (round your response to three decimal places). Lower Control Limit (LCLR) = mL (round your response to three decimal places).arrow_forward
- K Claudine Soosay recorded the following times assembling a watch: Observation No. 1234567co 8 Time (minutes) 0.12 0.10 0.11 0.11 0.15 0.10 0.10 0.10 Observation No. 9 10 11 12 13 14 15 16 Time (minutes) 0.11 0.08 0.11 0.10 0.10 0.11 0.14 0.08arrow_forwardTime left 1:06:0- In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken each having 4 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the R chart? O a. 0,28.17 O b. 0,31.17 OC None is correct O d. 0,24.71 O e. 0,30.47 Of. 0,29.17 US PAGE NEXT PAGE O # C a pe here to search Prt F10 F12 %23 & 2 . 3 5 6 V. 8. R T. Y U P 41 S F J G y H K L / C V } BYN i 10 Alt Alt Ctrlarrow_forwardDetermine the standard time of the process using the below-recorded observations. Hint: remove unusual time observationsarrow_forward
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