Question 1

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

Accepted Answer

A) mean 
B) variance 
C) standard deviation 
D) range 
E) proportion 
A) mean 
B) variance 
C) standard deviation 
D) range 
E) proportion

Question 2

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each
 
If he uses upper and lower control limits of 22 and 18 ounces, on what day(s), if any, does this process appear to be out of control?

Accepted Answer

A) Monday 
B) Tuesday 
C) Monday and Tuesday 
D) Monday, Tuesday, and Thursday 
E) None 
A) Monday 
B) Tuesday 
C) Monday and Tuesday 
D) Monday, Tuesday, and Thursday 
E) None

Question 3

Approximately 99.7 percent of sample means will fall within plus or minus two standard deviations of the process mean if the process is under control.

Accepted Answer

A) True 
 B)False

Question 4

A quality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are in control with regard to a particular quality attribute. Accordingly, she inspected 1,000 units of output from each machine in random samples, with the following results
 
For upper and lower control limits of .026 and .014, which machine(s), if any, appear(s)to be out-of-control for process proportion of defectives?

Accepted Answer

A) machine #3 
B) machine #4 
C) machines #3 and #4 
D) machines #2 and #3 
E) none of the machines 
A) machine #3 
B) machine #4 
C) machines #3 and #4 
D) machines #2 and #3 
E) none of the machines

Question 5

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each
 
What is the sample mean package weight for Thursday?

Accepted Answer

A) 19 ounces 
B) 20 ounces 
C) 20.6 ounces 
D) 21 ounces 
E) 23 ounces 
A) 19 ounces 
B) 20 ounces 
C) 20.6 ounces 
D) 21 ounces 
E) 23 ounces

Question 6

The output of a process may not conform to specifications even though the process may be statistically "in control."

Accepted Answer

A) True 
 B)False

Question 7

The amount of inspection we choose can range from no inspection at all to inspecting each item numerous times.

Accepted Answer

A) True 
 B)False

Question 8

The range chart ( R-chart)is most likely to detect a change in

Accepted Answer

A) proportion. 
B) mean. 
C) number defective. 
D) variability. 
E) sample size. 
A) proportion. 
B) mean. 
C) number defective. 
D) variability. 
E) sample size.

Question 9

Control limits used on process control charts are specifications established by design or customers.

Accepted Answer

A) True 
 B)False

Question 10

Cpk can be used only when the process is centered.

Accepted Answer

A) True 
 B)False

Question 11

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

Accepted Answer

A) True 
 B)False

Question 12

The best way to assure quality is to use extensive inspection and control charts.

Accepted Answer

A) True 
 B)False

Question 13

The amount of inspection needed depends on _____ and _____.

Accepted Answer

A) the amount of automation; the reliability of inspectors 
B) the quality of the supplier; the target market of the process 
C) the costs of inspection; the costs of passing on defective items 
D) where in the process the inspection occurs; the volume of the process 
E) the cost of the item being inspected; the use of the item being inspected 
A) the amount of automation; the reliability of inspectors 
B) the quality of the supplier; the target market of the process 
C) the costs of inspection; the costs of passing on defective items 
D) where in the process the inspection occurs; the volume of the process 
E) the cost of the item being inspected; the use of the item being inspected

Question 14

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each
 
What is the mean of the sampling distribution of sample means when this process is in control?

Accepted Answer

A) 18 ounces 
B) 19 ounces 
C) 20 ounces 
D) 21 ounces 
E) 22 ounces 
A) 18 ounces 
B) 19 ounces 
C) 20 ounces 
D) 21 ounces 
E) 22 ounces

Question 15

The Taguchi loss function suggests that the capability ratio can be improved by extending the spread between LCL and UCL.

Accepted Answer

A) True 
 B)False

Question 16

The greater the volume of the process being targeted for inspection, the more attractive _____ inspection is.

Accepted Answer

A) monitored 
B) controlled 
C) periodic 
D) variable 
E) automated 
A) monitored 
B) controlled 
C) periodic 
D) variable 
E) automated

Question 17

The purpose of quality control is making sure that processes are performing in an acceptable manner.

Accepted Answer

A) True 
 B)False

Question 18

Run tests give managers an alternative to control charts; they are quicker and cost less.

Accepted Answer

A) True 
 B)False

Question 19

Consider the following information
 
The number of runs up and down for the preceding data is

Accepted Answer

A) 3. 
B) 4. 
C) 5. 
D) 6. 
E) none of these. 
A) 3. 
B) 4. 
C) 5. 
D) 6. 
E) none of these.

Question 20

High-cost, low-volume items often require careful inspection since we may have large costs associated with passing defectives.

Accepted Answer

A) True 
 B)False

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

Approximately 99.7 percent of sample means will fall within plus or minus two standard deviations of the process mean if the process is under control.

The output of a process may not conform to specifications even though the process may be statistically "in control."

The amount of inspection we choose can range from no inspection at all to inspecting each item numerous times.

The range chart ( R-chart)is most likely to detect a change in

Control limits used on process control charts are specifications established by design or customers.

C_pk can be used only when the process is centered.

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

The best way to assure quality is to use extensive inspection and control charts.

The amount of inspection needed depends on _ and _.

The Taguchi loss function suggests that the capability ratio can be improved by extending the spread between LCL and UCL.

The greater the volume of the process being targeted for inspection, the more attractive _____ inspection is.

The purpose of quality control is making sure that processes are performing in an acceptable manner.

Run tests give managers an alternative to control charts; they are quicker and cost less.

Consider the following information The number of runs up and down for the preceding data is

High-cost, low-volume items often require careful inspection since we may have large costs associated with passing defectives.

Introduction to Operations Management

Competitiveness, Strategy, and Productivity

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Process Selection and Facility Layout

Work Design and Measurement

Location Planning and Analysis

Management of Quality

Aggregate Planning and Master Scheduling

Inventory Management

MRP and ERP

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

Exam 10: Quality Control

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

Approximately 99.7 percent of sample means will fall within plus or minus two standard deviations of the process mean if the process is under control.

The output of a process may not conform to specifications even though the process may be statistically "in control."

The amount of inspection we choose can range from no inspection at all to inspecting each item numerous times.

The range chart ( R-chart)is most likely to detect a change in

Control limits used on process control charts are specifications established by design or customers.

Cpk can be used only when the process is centered.

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

The best way to assure quality is to use extensive inspection and control charts.

The amount of inspection needed depends on _____ and _____.

The Taguchi loss function suggests that the capability ratio can be improved by extending the spread between LCL and UCL.

The greater the volume of the process being targeted for inspection, the more attractive _____ inspection is.

The purpose of quality control is making sure that processes are performing in an acceptable manner.

Run tests give managers an alternative to control charts; they are quicker and cost less.

Consider the following information The number of runs up and down for the preceding data is

High-cost, low-volume items often require careful inspection since we may have large costs associated with passing defectives.

Introduction to Operations Management

Competitiveness, Strategy, and Productivity

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Process Selection and Facility Layout

Work Design and Measurement

Location Planning and Analysis

Management of Quality

Aggregate Planning and Master Scheduling

Inventory Management

MRP and ERP

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

C_pk can be used only when the process is centered.

The amount of inspection needed depends on _ and _.