Reference no: EM13348133
Question 1
A process is said to be out of control if
Answer
a point falls above the upper or below the lower control lines.
eight or more consecutive points fall above the center line or eight or more consecutive points fall below the center line.
Either of these.
None of these.
Question 2
Determining the root causes of why defects can occur along with the variables in the process that cause these defects to occur involves which part of the DMAIC process?
Answer
Define
Measure
Analyze
Improve
Control
Question 3
Developing operational definitions for each critical-to-quality characteristic involves which part of the DMAIC process?
Answer
Define
Measure
Analyze
Improve
Control
Question 4
Maintaining the gains that have been made with a revised process in the long term by avoiding potential problems that can occur when a process is changed involves which part of the DMAIC process?
Answer
Define
Measure
Analyze
Improve
Control
Question 5
Once the control limits are set for a control chart, one attempts to
Answer
discern patterns that might exist in values over time.
determine whether any points fall outside the control limits.
Both of these.
None of these.
Question 6
One of the morals of the red bead experiment is
Answer
variation is part of the process.
only management can change the process.
it is the process that primarily determines performance.
All of these.
Question 7
TABLE 17-2
A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too erratic.
Referring to Table 17-2, what is the numerical value of the upper control limit for the p chart?
Answer
0.92
0.89
0.71
0.62
Question 8
TABLE 17-2
A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too erratic.
Referring to Table 17-2, which expression best characterizes the p chart?
Answer
In-control
Increasing trend
Decreasing trend
Individual outliers
Question 9
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. What is the center line of this R chart?
Answer
4.8
6.0
6.9
7.1
Question 10
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. What is the upper control limit for this R chart?
Answer
10.66
9.37
7.98
6.34
Question 11
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. The R chart is characterized by which of the following?
Answer
Increasing trend
Decreasing trend
In-control
Points outside the control limits
Question 12
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the sample mean and range data were based on 11 observations per day instead of 10. How would this change affect the lower and upper control limits of the R chart?
Answer
LCL would increase; UCL would decrease.
LCL would remain the same; UCL would decrease.
Both LCL and UCL would remain the same.
LCL would decrease; UCL would increase.
Question 13
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the analyst constructs an chart to see if the production process is in-control. What is the lower control limit (LCL) for this chart?
Answer
47.60
56.15
57.15
58.05
Question 14
TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
Referring to Table 17-3, suppose the analyst constructs an chart to see if the production process is in-control. Which expression best describes this chart?
Answer
In-control
Increasing trend
Decreasing trend
Individual outliers
Question 15
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in-control. What is the center line of this R chart?
Answer
20.00
20.56
20.40
24.00
Question 16
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in-control. What is the lower control limit for this R chart?
Answer
-2.33
-2.28
0
cannot be determined
1 points
Question 17
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in-control. What is the upper control limit for the R-Chart?
Answer
43.13
42.28
0
Average of all R values
Question 18
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the sample mean and range data were based on 6 observations per hour instead of 5. How would this change affect the lower and upper control limits of an R chart?
Answer
LCL would increase; UCL would decrease.
LCL would remain the same; UCL would decrease.
Both LCL and UCL would remain the same.
LCL would decrease; UCL would increase.
Question 19
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the supervisor constructs an chart to see if the process is in-control. What are the lower and upper control limits of this chart?
Answer
10.00, 30.00
8.49, 32.03
5.39, 35.13
4.96, 35.56
Question 20
TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
Referring to Table 17-4, suppose the supervisor constructs an chart to see if the process is in-control. Which expression best describes this chart?
Answer
Decreasing trend
In-control
Increasing trend
Individual outliers
Question 21
The principal focus of the control chart is the attempt to separate special or assignable causes of variation from common causes of variation. Which causes of variation can be reduced only by changing the process?
Answer
Special or assignable causes
Common causes
Total causes
None of these
Question 22
Variation due to the inherent variability in a system of operation is called
Answer
special or assignable causes.
common or chance causes.
explained variation.
the standard deviation.
Question 23
Variation signaled by individual fluctuations or patterns in the data is called
Answer
special or assignable causes.
common or chance causes.
explained variation.
the standard deviation.
Question 24
Which famous statistician developed the 14 points of quality?
Answer
Shewhart
Deming
Chebyshev
Taguchi
Question 25
Which of the following best measures the ability of a process to consistently meet specified customer-driven requirement?
Answer
Process capability.
Specification limits
Upper control limit
Lower control limit
Question 26
Which of the following is a method for breaking process into a series of steps in order to eliminate defects and produce near perfect results?
Answer
Deming's 14 points management
Six Sigma management
Shewhart-Deming cycle
R chart and chart
Question 27
Which of the following is not part of the DMAIC process in Six Sigma management?
Answer
Define
Do
Analyze
Control
Question 28
Which of the following is not one of Deming's 14 points?
Answer
Belief in mass inspection
Create constancy of purpose for improvement of product or service
Adopt and institute leadership
Drive out fear
Question 29
Which of the following is not one of Deming's 14 points?
Answer
Create constancy of purpose for improvement of product or service
Award business on the basis of price tag alone
Break down barriers between staff areas
Drive out fear
Question 30
Which of the following situations suggests a process that appears to be operating in a state of statistical control?
Answer
A control chart with a series of consecutive points that are above the center line and a series of consecutive points that are below the center line
A control chart in which no points fall outside either the upper control limit or the lower control limit and no patterns are present
A control chart in which several points fall outside the upper control limit
All of these