Question 1

The 1:10:100 Rule supports the need for control and a focus on prevention by building quality at the source.

Accepted Answer

A) True 
 B)False

Question 2

Which one of the following statements about the Casey Company case study on quality management is TRUE?

Accepted Answer

A)  The first step in this case analysis was to create a process flowchart and checksheet. 
B)  Control charts verify that all aspects of the process are in statistical process control. 
C)  Control charts verify that the data entry employee was doing an excellent job. 
D)  The R-chart for this statistical process control analysis was out of control. 
A)  The first step in this case analysis was to create a process flowchart and checksheet. 
B)  Control charts verify that all aspects of the process are in statistical process control. 
C)  Control charts verify that the data entry employee was doing an excellent job. 
D)  The R-chart for this statistical process control analysis was out of control.

Question 3

Explain the issues associated with selecting the appropriate sample size and sampling frequency for control charts.

Accepted Answer

Designing control charts involves two ke

Question 4

Identify the chart that is also known as fraction nonconforming or fraction defective chart.

Accepted Answer

A)  A p-chart 
B)  A c-chart 
C)  An x-chart 
D)  An r-chart 
A)  A p-chart 
B)  A c-chart 
C)  An x-chart 
D)  An r-chart

Question 5

A manufacturer inspected 40 circuit boards and found a total of 640 defects. If the company wants to use statistical process control (SPC) to control the manufacturing process by monitoring the number of defects per circuit board, what type of chart should they use and what should be the control limits?

Accepted Answer

The correct chart to use is a c-chart. T

Question 6

A plastic cell phone case has been experiencing physical quality control problems. That is, the clear screen does not always fit (and snap into place) on the case. The dimensions of the screen have consistently been in statistical process control (SPC). A root cause quality initiative collected the following data about the plastic cell phone case. Analyze the width of the cell phone case using control charts and make a recommendation.
Table 1 Cell Phone Plastic Case Widths in Centimeters Data*
 $\begin{array} { | c | c | c | c | c | c | c | c | } 
\hline & \text { Sample 1 } & \text { Sample 2 } & \text { Sample 3 } & \text { Sample 4 } & \text { Sample 5 } & \text { Sample 6 } & \text { Sample 7 } \
\hline \text { Observation } & & & & & & & \
\hline \# 1 & 6.02 & 5.92 & 5.88 & 5.99 & 6.05 & 5.94 & 6.00 \
\hline \# 2 & 5.97 & 5.83 & 5.97 & 6.08 & 6.06 & 5.96 & 5.95 \
\hline \# 3 & 5.90 & 5.87 & 5.88 & 6.08 & 5.98 & 5.99 & 5.82 \
\hline \text { Average } & 5.963 & 5.873 & 5.91 & 6.05 & 6.03 & 5.963 & 5.923 \
\hline \text { Range } & 0.12 & 0.09 & 0.09 & 0.09 & 0.08 & 0.05 & 0.18 \
\hline
\end{array}$ *The sample averages and ranges helps in avoiding simple math errors and quickens the time to complete the SPC analysis.
-Using Table 1, for the X-chart, what is the value of UCLX?

Accepted Answer

A)  Less than or equal to 3.0 
B)  Greater than 3.0 but less than or equal to 4.0 
C)  Greater than 4.0 but less than or equal to 5.0 
D)  Greater than 5.0 
A)  Less than or equal to 3.0 
B)  Greater than 3.0 but less than or equal to 4.0 
C)  Greater than 4.0 but less than or equal to 5.0 
D)  Greater than 5.0

Question 7

The center line (p-bar) for a p-chart is 0.50 with an ULC = 0.70 and a LCL = 0.35. The results of the next eight sample means are 0.45, 0.60, 0.39, 0.44, 0.48, 0.58, 0.54, and 0.64. Which of the following actions should be taken in this scenario?

Accepted Answer

A)  Nothing-the process is in control. 
B)  Investigate assignable causes because four observations are above the center line. 
C)  Investigate assignable causes because there is a bad trend (run). 
D)  Investigate assignable causes because four of the eight samples are below the center line. 
A)  Nothing-the process is in control. 
B)  Investigate assignable causes because four observations are above the center line. 
C)  Investigate assignable causes because there is a bad trend (run). 
D)  Investigate assignable causes because four of the eight samples are below the center line.

Question 8

If one was monitoring the average time to load a web page, the chart to use would be a(n) _____.

Accepted Answer

A)  R- or x-bar chart 
B)  sample-size chart 
C)  p-chart 
D)  c-chart 
A)  R- or x-bar chart 
B)  sample-size chart 
C)  p-chart 
D)  c-chart

Question 9

Which is NOT related to a discrete metric?

Accepted Answer

A)  Counting 
B)  Visual yes or no inspection 
C)  Good or bad 
D)  Time 
A)  Counting 
B)  Visual yes or no inspection 
C)  Good or bad 
D)  Time

Question 10

Table 1 Statistical Process Control (SPC) Problem Data*
 $\begin{array}{|c|c|c|c|c|c|}\hline \text { Sample } & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} \
\hline \text { Number } & 1 & 2 & 3 & \begin{array}{c}
\text { Row } \
\text { Average }
\end{array} & \text { Row Range } \
\hline 1 & 10.1 & 10.6 & 9.6 & 10.1 & 1.00 \
\hline 2 & 9.7 & 9.4 & 9.0 & 9.37 & 0.70 \
\hline 3 & 10.1 & 9.1 & 10.3 & 9.83 & 1.20 \
\hline 4 & 10.1 & 10.3 & 10.9 & 10.43 & 0.80 \
\hline 5 & 10.2 & 9.8 & 9.0 & 9.67 & 1.20 \
\hline 6 & 10.6 & 10.2 & 9.5 & 10.10 & 1.10 \
\hline 7 & 9.5 & 10.2 & 10.2 & 9.97 & 0.70 \
\hline
\end{array}$ *The range and row average help you avoid simple math errors and quicken the time to complete the SPC analysis but you have to know what to use when.
-Using Table 1, for the R-chart, what is the value of LCLR?

Accepted Answer

A)  Less than or equal to 1.0 
B)  Greater than 1.0 but less than or equal to 1.5 
C)  Greater than 1.5 but less than or equal to 2.0 
D)  Greater than 2.0 
A)  Less than or equal to 1.0 
B)  Greater than 1.0 but less than or equal to 1.5 
C)  Greater than 1.5 but less than or equal to 2.0 
D)  Greater than 2.0

Question 11

Process capability quantifies the variation that results from common causes.

Accepted Answer

A) True 
 B)False

Question 12

Table 1 Statistical Process Control (SPC) Problem Data*
 $\begin{array}{|c|c|c|c|c|c|}\hline \text { Sample } & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} & \begin{array}{c}
\text { Observation } \
\text { Number }
\end{array} \
\hline \text { Number } & 1 & 2 & 3 & \begin{array}{c}
\text { Row } \
\text { Average }
\end{array} & \text { Row Range } \
\hline 1 & 10.1 & 10.6 & 9.6 & 10.1 & 1.00 \
\hline 2 & 9.7 & 9.4 & 9.0 & 9.37 & 0.70 \
\hline 3 & 10.1 & 9.1 & 10.3 & 9.83 & 1.20 \
\hline 4 & 10.1 & 10.3 & 10.9 & 10.43 & 0.80 \
\hline 5 & 10.2 & 9.8 & 9.0 & 9.67 & 1.20 \
\hline 6 & 10.6 & 10.2 & 9.5 & 10.10 & 1.10 \
\hline 7 & 9.5 & 10.2 & 10.2 & 9.97 & 0.70 \
\hline
\end{array}$ *The range and row average help you avoid simple math errors and quicken the time to complete the SPC analysis but you have to know what to use when.
-Given the previous results and analysis for the R-chart, one would:

Accepted Answer

A)  conclude that the R-chart is in statistical control and proceed to develop the x-bar chart. 
B)  conclude that the R-chart is not in statistical control and proceed to develop the x-bar chart. 
C)  investigate sample # 3 as it is outside the R-chart control limits and redo the R-chart. 
D)  plot the x-bar sample means first to see if they are randomly distributed. 
A)  conclude that the R-chart is in statistical control and proceed to develop the x-bar chart. 
B)  conclude that the R-chart is not in statistical control and proceed to develop the x-bar chart. 
C)  investigate sample # 3 as it is outside the R-chart control limits and redo the R-chart. 
D)  plot the x-bar sample means first to see if they are randomly distributed.

Question 13

In-process quality control is typically performed by the employees who run the processes.

Accepted Answer

A) True 
 B)False

Question 14

An airline found that on average, 0.62 percent of the luggage they received from passengers at LAX (Los Angeles Airport) is lost or damaged. On a typical day, 1000 pieces of luggage pass through this airport. What are the control limits for a p-chart for monitoring the daily fraction nonconforming?

Accepted Answer

Standard deviation of p-bar =

Question 15

A production process is sampled 24 times with a sample size of 6 yields, an overall mean of 25.2, and an average range of 0.8. Determine the control limits for the x-bar and R-charts.

Accepted Answer

For the x-bar-chart, A₂ = 0.483; thus the

Question 16

To account for the process centering, two-sided capability index is often used.

Accepted Answer

A) True 
 B)False

Question 17

To monitor the fraction of printed circuit boards that do not pass a functional test, a(n) _____ is used.

Accepted Answer

A)  k-chart 
B)  p-chart 
C)  c-chart 
D)  R-chart 
A)  k-chart 
B)  p-chart 
C)  c-chart 
D)  R-chart

Question 18

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

Accepted Answer

A) True 
 B)False

Question 19

Over-adjusting a process that is in control will usually increase the variation in the output.

Accepted Answer

A) True 
 B)False

Question 20

Indications in a control chart of an out-of-control situation include all of the following EXCEPT:

Accepted Answer

A)  a shift in the average value. 
B)  the same number of points above and below the center line. 
C)  points that lie outside upper and lower control limits. 
D)  a cyclical pattern in the chart. 
A)  a shift in the average value. 
B)  the same number of points above and below the center line. 
C)  points that lie outside upper and lower control limits. 
D)  a cyclical pattern in the chart.

The 1:10:100 Rule supports the need for control and a focus on prevention by building quality at the source.

Which one of the following statements about the Casey Company case study on quality management is TRUE?

Explain the issues associated with selecting the appropriate sample size and sampling frequency for control charts.

Identify the chart that is also known as fraction nonconforming or fraction defective chart.

The center line (p-bar) for a p-chart is 0.50 with an ULC = 0.70 and a LCL = 0.35. The results of the next eight sample means are 0.45, 0.60, 0.39, 0.44, 0.48, 0.58, 0.54, and 0.64. Which of the following actions should be taken in this scenario?

If one was monitoring the average time to load a web page, the chart to use would be a(n) _____.

Which is NOT related to a discrete metric?

Process capability quantifies the variation that results from common causes.

In-process quality control is typically performed by the employees who run the processes.

An airline found that on average, 0.62 percent of the luggage they received from passengers at LAX (Los Angeles Airport) is lost or damaged. On a typical day, 1000 pieces of luggage pass through this airport. What are the control limits for a p-chart for monitoring the daily fraction nonconforming?

A production process is sampled 24 times with a sample size of 6 yields, an overall mean of 25.2, and an average range of 0.8. Determine the control limits for the x-bar and R-charts.

To account for the process centering, two-sided capability index is often used.

To monitor the fraction of printed circuit boards that do not pass a functional test, a(n) _____ is used.

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

Over-adjusting a process that is in control will usually increase the variation in the output.

Indications in a control chart of an out-of-control situation include all of the following EXCEPT:

Goods, Services, and Operations Management

Value Chains

Measuring Performance in Operations

Operations Strategy

Technology and Operations Management

Goods and Service Design

Process Selection, Design, and Analysis

Facility and Work Designs

Supply Chain Design

Capacity Management

Forecasting and Demand Planning

Managing Inventories

Resource Management

Operations Scheduling and Sequencing

Quality Management

Appendix: Quality Management

Appendix: Queuing Analysis

Appendix: Modeling Using Linear Programming

Lean Operating Systems

Appendix: Simulation

Project Management

Appendix: Decision Analysis

Filters

Exam 16: Quality Control and Spc

The 1:10:100 Rule supports the need for control and a focus on prevention by building quality at the source.

Which one of the following statements about the Casey Company case study on quality management is TRUE?

Explain the issues associated with selecting the appropriate sample size and sampling frequency for control charts.

Identify the chart that is also known as fraction nonconforming or fraction defective chart.

The center line (p-bar) for a p-chart is 0.50 with an ULC = 0.70 and a LCL = 0.35. The results of the next eight sample means are 0.45, 0.60, 0.39, 0.44, 0.48, 0.58, 0.54, and 0.64. Which of the following actions should be taken in this scenario?

If one was monitoring the average time to load a web page, the chart to use would be a(n) _____.

Which is NOT related to a discrete metric?

Process capability quantifies the variation that results from common causes.

In-process quality control is typically performed by the employees who run the processes.

An airline found that on average, 0.62 percent of the luggage they received from passengers at LAX (Los Angeles Airport) is lost or damaged. On a typical day, 1000 pieces of luggage pass through this airport. What are the control limits for a p-chart for monitoring the daily fraction nonconforming?

A production process is sampled 24 times with a sample size of 6 yields, an overall mean of 25.2, and an average range of 0.8. Determine the control limits for the x-bar and R-charts.

To account for the process centering, two-sided capability index is often used.

To monitor the fraction of printed circuit boards that do not pass a functional test, a(n) _____ is used.

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

Over-adjusting a process that is in control will usually increase the variation in the output.

Indications in a control chart of an out-of-control situation include all of the following EXCEPT:

Goods, Services, and Operations Management

Value Chains

Measuring Performance in Operations

Operations Strategy

Technology and Operations Management

Goods and Service Design

Process Selection, Design, and Analysis

Facility and Work Designs

Supply Chain Design

Capacity Management

Forecasting and Demand Planning

Managing Inventories

Resource Management

Operations Scheduling and Sequencing

Quality Management

Appendix: Quality Management

Appendix: Queuing Analysis

Appendix: Modeling Using Linear Programming

Lean Operating Systems

Appendix: Simulation

Project Management

Appendix: Decision Analysis

Filters