Exam 6: Quality and Process Improvement
Exam 1: Creating Customer Value through Operations128 Questions
Exam 2: Supply Chain Management171 Questions
Exam 3: Process Configuration137 Questions
Exam 4: Capacity145 Questions
Exam 5: Inventory Management177 Questions
Exam 6: Quality and Process Improvement240 Questions
Exam 7: Lean Systems158 Questions
Exam 8: Managing Projects153 Questions
Exam 9: Location and Layout217 Questions
Exam 10: Managing Demand and Forecasting189 Questions
Exam 11: Operations Planning and Scheduling138 Questions
Exam 12: Resource Planning174 Questions
Exam 13: Decision Making82 Questions
Exam 14: Financial Analysis41 Questions
Exam 15: Work Measurement98 Questions
Exam 16: Learning Curve Analysis44 Questions
Exam 17: Computer-Integrated Manufacturing53 Questions
Exam 18: Acceptance Sampling Plans71 Questions
Exam 19: Simulation36 Questions
Exam 20: Special Inventory Models33 Questions
Exam 21: Linear Programming57 Questions
Exam 22: Waiting Lines109 Questions
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One of the principles that total quality management (TQM)stresses is customer satisfaction.
(True/False)
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The UCL and LCL for an -chart are 100 ounces and 95 ounces,respectively.The sample size is 5.The inspector looks at the very next unit and finds that it is 108 ounces.What can you conclude? Why?
(Essay)
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Which one of the following is a direct effect of high scrap levels?
(Multiple Choice)
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A process is said to be in statistical control when ________,________,and ________ of its distribution does not change over time.
(Short Answer)
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________ refers to how well the product or service serves its intended purpose at a price customers are willing to pay.
(Short Answer)
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When customers are upset with their bank because of an incorrect financial statement,the quality provided by the bank is poor from the aspect of
(Multiple Choice)
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Most experts estimate the cost of poor quality in the range of 20 to 30 percent of gross sales for defective or unsatisfactory products.
(True/False)
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A manufacturer of silk inspects each bolt of material at the end of the manufacturing process.When the process is in control,it averages 11 defects per bolt.If a 2-sigma control limit is used,what should be done if a bolt is found with 3 defects?
(Multiple Choice)
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A company is interested in monitoring the number of scratches on Plexiglas panels.The appropriate control chart to use would be
(Multiple Choice)
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Use the information from Table 6.3.What is the upper control limit (UCL)if the bank were to use z = 2 and a sample size of 100?
(Multiple Choice)
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One chart commonly used for quality measures based on product or service attributes is the X-bar chart.
(True/False)
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Table 6.4
The manager of Kewpie has recently implemented an attribute-based process control method. The accompanying table shows the results of five different samples of dolls from the five weeks of production after the process control method was implemented.
Week Sample Size Number Defective 1 100 3 2 100 20 3 100 23 4 100 12 5 100 13
-Assume that the newly implemented control chart has a central line of p = 0.10,with the standard deviation computed from this original value.Assume also that z = 2 is used for defining the control limits and sample sizes of 100 dolls.What can be said about the doll-making process based on the first five weeks of experience from Table 6.4?
(Multiple Choice)
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Table 6.1
Factors for Calculating Three-Sigma Limits for the -chart and R-chart
Size of Sample (n) Factor for UCL and LCL for X - Charts Factor for LCL for R - Charts Factor for UCL for R - Charts 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.397 0.184 1.816 10 0.308 0.233 1.777
Source: 1950 Manual on Quality Control of Materials, copyright
American Society for Testing Materials. Reprinted with permission.
-Historically,the average diameter of the holes drilled has been 0.25 cm and the average range has been 0.1 cm.Determine the central line and upper and lower control limits for an - and an R-chart,assuming samples of size 8 will be taken.Use Table 6.1.For the R-chart,what is the value of the LCLR?
(Multiple Choice)
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Table 6.1
Factors for Calculating Three-Sigma Limits for the -chart and R-chart
Size of Sample (n) Factor for UCL and LCL for X - Charts Factor for LCL for R - Charts Factor for UCL for R - Charts 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.397 0.184 1.816 10 0.308 0.233 1.777
Source: 1950 Manual on Quality Control of Materials, copyright
American Society for Testing Materials. Reprinted with permission.
-Historically,the average diameter of the holes drilled has been 0.25 cm and the average range has been 0.1 cm.Determine the central line and upper and lower control limits for an - and an R-chart,assuming samples of size 8 will be taken.Use Table 6.1.For the R-chart,what is the value of the UCLR?
(Multiple Choice)
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Firms should avoid having errors or defects caught and corrected at the source.
(True/False)
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A product is composed of three subsystems that have reliabilities of .999,.997,and .985.What is the overall reliability of this product?
(Essay)
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Internal failure costs result from defects that are discovered after the production of a service or product.
(True/False)
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Table 6.2
Observation Number
Sample Number 1 2 3 4 5 1 10.1 10.6 9.8 9.9 10.9 2 9.7 9.5 10.3 9.9 10.5 3 10.1 10.7 9.2 10.0 10.1 4 9.9 9.8 10.5 10.4 10.1 5 10.4 10.1 10.9 9.9 10.3
-Using Table 6.2,for the R-chart,what is the value of LCLR?
(Multiple Choice)
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