Question 1

The sample size for an x-chart:

Accepted Answer

A) should be between 25 and 30. 
B) is larger than that for an-chart. 
C) is equal to one. 
D) should be greater than one. 
A) should be between 25 and 30. 
B) is larger than that for an-chart. 
C) is equal to one. 
D) should be greater than one.

Question 2

A histogram of data that resembles the normal distribution indicates that the process is in control.

Accepted Answer

A) True 
 B)False

Question 3

RM Industries wishes to monitor its end-of-week accounts receivable balance.To do so,the end-of-week balances for the previous 25 weeks were recorded and are shown below.Establish an x-chart and a moving range (using n = 2) chart for this process.

Accepted Answer

A moving range,with n = 2,is defined as

Question 4

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process.

Accepted Answer

Statistical process control (SPC) is a m

Question 5

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.26 coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

Accepted Answer

Use a c-chart. @#IMG-DLM& 
= (1 + 3 + 4

Question 6

A better alternative to the   
-chart to monitor variation is to compute and plot the standard deviation s of each sample.

Accepted Answer

A) True 
 B)False

Question 7

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of such defect packages per week and plans to sample 120 packages every week.The appropriate control chart is a(n):

Accepted Answer

A) -chart. 
B) R-chart. 
C) p-chart. 
D) np-chart. 
A) -chart. 
B) R-chart. 
C) p-chart. 
D) np-chart.

Question 8

Each day,a manufacturing company producing circuit boards will randomly sample 60 circuit boards for a period of 25 days and then determine and plot the number of defects contained in each of these boards.The appropriate control chart is a(n):

Accepted Answer

A) u-chart. 
B) p-chart. 
C) np-chart. 
D) c-chart. 
A) u-chart. 
B) p-chart. 
C) np-chart. 
D) c-chart.

Question 9

Discuss the different devices that the quality assurance inspectors at Kroger use to help conduct the quality control process.

Accepted Answer

Inspectors use several different devices

Question 10

The total observed variation in production output is the sum of the true process variation plus variation due to measurement.

Accepted Answer

A) True 
 B)False

Question 11

Control limits are often confused with _____.

Accepted Answer

A) pre-control lines 
B) center lines 
C) specification limits 
D) three sigma limits 
A) pre-control lines 
B) center lines 
C) specification limits 
D) three sigma limits

Question 12

A quality engineer took 40 samples of 100 transistors each from the output of an assembly line.Each transistor was tested and the number of defectives in each sample is recorded in the table below.Determine the control chart limits for a p-chart.

Accepted Answer

@#IMG-DLM& 
= @#IMG-DLM& 
= (3/100 + 2/100 + 1/100

Question 13

The control chart most appropriate for plotting the daily percentage of students that wait longer than 5 minutes in line at the undergraduate admissions office is a(n):

Accepted Answer

A) p-chart. 
B) np-chart. 
C) x-chart. 
D)   -chart 
A) p-chart. 
B) np-chart. 
C) x-chart. 
D)   -chart

Question 14

In the production of vitamin capsules,the proportion of calcium in each capsule has a specification of 48 ± 18 parts per million (ppm).An initial random sample of 100 capsules revealed a sample average calcium content of 44.5 ppm and a sample standard deviation of 3.2 ppm.Management uses   
- and R-charts to monitor the calcium amount using samples each of size 4.
The charts depict an in-control process.The center line of the R-chart is 6.7 and the center line of the   
-chart is 44.8. 
a.Compute Cp for this process using estimates of the process mean and standard deviation derived from the random sample.
b.Compute Cp for this process using estimates of the process mean and standard deviation derived from the control chart parameters.
c.Compute Cpk for this process using estimates of the process mean and standard deviation derived from the control chart parameters.
c.Compute Cpk for this process using estimates of the process mean and standard deviation derived from the random sample.
d.What do the differences between the values of Cp and Cpk tell you?

Accepted Answer

a. @#IMG-DLM& b. @#IMG-DLM& c. @#IMG-DLM& @#IMG-DLM& and @#IMG-DLM& Therefore,C_pk = 1.

Question 15

In service applications,the term _____ is generally used to describe a nonconformance.

Accepted Answer

A) error 
B) unit 
C) cycle 
D) trend 
A) error 
B) unit 
C) cycle 
D) trend

Question 16

Pre-control should only be used when process capability is greater than 88 percent of the tolerance.

Accepted Answer

A) True 
 B)False

Question 17

x-charts are used for:

Accepted Answer

A) averages of variables data. 
B) individual attributes data. 
C) individual variables data. 
D) averages of attributes data. 
A) averages of variables data. 
B) individual attributes data. 
C) individual variables data. 
D) averages of attributes data.

Question 18

Variable data are _____.

Accepted Answer

A) discrete 
B) not measurable 
C) nonrandom 
D) continuous 
A) discrete 
B) not measurable 
C) nonrandom 
D) continuous

Question 19

The s-chart is recommended when:

Accepted Answer

A) the control chart calculations needs to be performed by hand. 
B) tight control of variability in the process is required. 
C) the-chart is not associated with an R-chart. 
D) the sample size for each sample needs to be reduced. 
A) the control chart calculations needs to be performed by hand. 
B) tight control of variability in the process is required. 
C) the-chart is not associated with an R-chart. 
D) the sample size for each sample needs to be reduced.

Question 20

If the variation in the process is due to common causes alone,the process is said to be:

Accepted Answer

A) out of control. 
B) in statistical control. 
C) in pre-control. 
D) out of capability. 
A) out of control. 
B) in statistical control. 
C) in pre-control. 
D) out of capability.

The sample size for an x-chart:

A histogram of data that resembles the normal distribution indicates that the process is in control.

RM Industries wishes to monitor its end-of-week accounts receivable balance.To do so,the end-of-week balances for the previous 25 weeks were recorded and are shown below.Establish an x-chart and a moving range (using n = 2) chart for this process.

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process.

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.26 coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

A better alternative to the -chart to monitor variation is to compute and plot the standard deviation s of each sample.

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of such defect packages per week and plans to sample 120 packages every week.The appropriate control chart is a(n):

Each day,a manufacturing company producing circuit boards will randomly sample 60 circuit boards for a period of 25 days and then determine and plot the number of defects contained in each of these boards.The appropriate control chart is a(n):

Discuss the different devices that the quality assurance inspectors at Kroger use to help conduct the quality control process.

The total observed variation in production output is the sum of the true process variation plus variation due to measurement.

Control limits are often confused with _____.

A quality engineer took 40 samples of 100 transistors each from the output of an assembly line.Each transistor was tested and the number of defectives in each sample is recorded in the table below.Determine the control chart limits for a p-chart.

The control chart most appropriate for plotting the daily percentage of students that wait longer than 5 minutes in line at the undergraduate admissions office is a(n):

In service applications,the term _____ is generally used to describe a nonconformance.

Pre-control should only be used when process capability is greater than 88 percent of the tolerance.

x-charts are used for:

Variable data are _____.

The s-chart is recommended when:

If the variation in the process is due to common causes alone,the process is said to be:

Introduction to Quality

Foundations of Quality Management

Customer Focus

Workforce Focus

Process Focus

Statistical Methods in Quality Management

Design for Quality and Product Excellence

Process Improvement and Six Sigma

The Baldrige Framework for Performance Excellence

Strategy and Performance Excellence

Measurement and Knowledge Management for Performance Excellence

Leadership for Performance Excellence

Building and Sustaining Quality and Performance Excellence

Filters

Exam 8: Measuring and Controlling Quality

The sample size for an x-chart:

A histogram of data that resembles the normal distribution indicates that the process is in control.

RM Industries wishes to monitor its end-of-week accounts receivable balance.To do so,the end-of-week balances for the previous 25 weeks were recorded and are shown below.Establish an x-chart and a moving range (using n = 2) chart for this process.

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process.

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.26 coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

A better alternative to the -chart to monitor variation is to compute and plot the standard deviation s of each sample.

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of such defect packages per week and plans to sample 120 packages every week.The appropriate control chart is a(n):

Each day,a manufacturing company producing circuit boards will randomly sample 60 circuit boards for a period of 25 days and then determine and plot the number of defects contained in each of these boards.The appropriate control chart is a(n):

Discuss the different devices that the quality assurance inspectors at Kroger use to help conduct the quality control process.

The total observed variation in production output is the sum of the true process variation plus variation due to measurement.

Control limits are often confused with _____.

A quality engineer took 40 samples of 100 transistors each from the output of an assembly line.Each transistor was tested and the number of defectives in each sample is recorded in the table below.Determine the control chart limits for a p-chart.

The control chart most appropriate for plotting the daily percentage of students that wait longer than 5 minutes in line at the undergraduate admissions office is a(n):

In service applications,the term _____ is generally used to describe a nonconformance.

Pre-control should only be used when process capability is greater than 88 percent of the tolerance.

x-charts are used for:

Variable data are _____.

The s-chart is recommended when:

If the variation in the process is due to common causes alone,the process is said to be:

Introduction to Quality

Foundations of Quality Management

Customer Focus

Workforce Focus

Process Focus

Statistical Methods in Quality Management

Design for Quality and Product Excellence

Process Improvement and Six Sigma

The Baldrige Framework for Performance Excellence

Strategy and Performance Excellence

Measurement and Knowledge Management for Performance Excellence

Leadership for Performance Excellence

Building and Sustaining Quality and Performance Excellence

Filters