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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Mean time between failures,failure rate per month,and average percentage of late arrivals are examples of which aspect of high-performance design?
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(Multiple Choice)
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Correct Answer:
C
A(n)________ is a diagram that relates a key quality problem to its potential causes.
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(Short Answer)
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Correct Answer:
cause-and-effect diagram
Which one of the following is a consequence of external failures?
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(Multiple Choice)
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Correct Answer:
C
The UCL and LCL for an -chart are 25 and 15 respectively.The central line is 20,and the process variability is considered to be in statistical control.The results of the next six sample means are 18,23,17,21,24,and 16.What should you do?
(Multiple Choice)
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The Deming wheel depicts a cycle with the following four steps: ________,________,________,and ________.
(Short Answer)
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A retail store wants to see if the accuracy of the prices that were entered into its database used for its cash registers is in control.It has collected 10 samples of size 500.The number of errors is found in the table below.Construct a 3-sigma p-chart to determine if this entry process is in control.
Sample Number Wrong Price Entries 1 5 2 2 3 7 4 1 5 3 6 2 7 8 8 1 9 3 10 4
(Essay)
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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
-Use the information in Table 6.4.The manager of Kewpie has decided to redesign the process control method (both central line and control limits)based on just the data from weeks 1-5.What is the new UCL? (Assume z = 2)
(Multiple Choice)
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The manufacturing of compact disks requires four steps.The reliabilities of the steps are 0.80,0.85,0.95,and 0.90 respectively.What is the reliability of the process to produce a good compact disk?
(Multiple Choice)
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________ is an approach to teamwork that moves responsibility for decision farther down the organizational chart--to the level of the employee actually doing the job.
(Short Answer)
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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-chart,what is the value of UCL ?
(Multiple Choice)
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A(n)________ is a bar chart on which the factors are plotted in decreasing order of frequency along the horizontal axis.
(Short Answer)
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One of the principles that total quality management (TQM)stresses is process reengineering.
(True/False)
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One function of control charts for variables is to monitor the mean of the process distribution.
(True/False)
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Which one of the following statements about quality control is TRUE?
(Multiple Choice)
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Which one of the following statements about quality is generally FALSE?
(Multiple Choice)
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The aspect of high-performance design that concerns the likelihood of a product working properly or service being performed during a specified period is termed ________.
(Short Answer)
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Samples of 100 checks each were taken at a bank from an encoding machine (which records the amount of a check)over a five-day period.Details are summarized in the Table 6.3.If the bank were to use the average proportion defective from these five samples as the central line for a process control chart,what would be the central line?
(Multiple Choice)
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Historically,the average time to service a customer complaint has been 3 days and the standard deviation has been 0.50 day.Management would like to specify the control limits for an -chart with a sample size of 10 and 3 sigma limits.The UCL for the chart would be
(Multiple Choice)
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Which one of the following statements about total quality management is TRUE?
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