Question 1

Control limits distinguish between non-random and assignable variability.

Accepted Answer

A) True 
 B)False

Question 2

The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four instructors teaching the basic P/OM course are under control with regard to the number of students who fail the course.Accordingly,he sampled 100 final grades from last year for each instructor,with the following results:   What is the sample proportion of failures for Prof.D?

Accepted Answer

A) 0 
B) .04 
C) .11 
D) .13 
E) .16 
A) 0 
B) .04 
C) .11 
D) .13 
E) .16

Question 3

A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results:   What is the sample mean for machine #1?

Accepted Answer

A) 15 
B) 16 
C) 17 
D) 21 
E) 23 
A) 15 
B) 16 
C) 17 
D) 21 
E) 23

Question 4

Typically the production of high-cost,low-volume items require little quality control inspection.

Accepted Answer

A) True 
 B)False

Question 5

A c-chart is used to monitor the number of defects per unit of a process output.

Accepted Answer

A) True 
 B)False

Question 6

A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under 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:   What is the sample proportion of defectives for machine #1?

Accepted Answer

A) .023 
B) .02 
C) .0115 
D) .0058 
E) .005 
A) .023 
B) .02 
C) .0115 
D) .0058 
E) .005

Question 7

Given the following process control data for a quality attribute (three samples of size 400 each):
   If the process proportion of defectives is unknown,what is the alpha risk (probability of Type I error)for upper and lower control limits of .115 and .085 respectively? .13 and .07? .145 and .055?

Accepted Answer

The answer of Given the following process control data for...

Question 8

Statistical process control is based on comparing periodic samples from a process to predetermined limits.

Accepted Answer

A) True 
 B)False

Question 9

Given the following process control data for a quality attribute (three samples of size 400 each):
   If the process proportion of defectives is unknown,using .10 alpha risk control limits,do any of the sample proportions indicate an out-of-control process proportion of defectives?

Accepted Answer

The answer of Given the following process control data for...

Question 10

Low-cost,high-volume items typically require relatively low levels of inspection.

Accepted Answer

A) True 
 B)False

Question 11

A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results:   What is the estimate of the process mean based on this limited number of samples?

Accepted Answer

A) 16 
B) 19 
C) 20 
D) 21 
E) 23 
A) 16 
B) 19 
C) 20 
D) 21 
E) 23

Question 12

When using control charts sample frequency is important Sampling frequency can be a function of the ______ of a process and the _____ to sample.

Accepted Answer

A) cost; cost 
B) frequency; cost 
C) frequency; time 
D) stability; cost 
E) stability; time 
A) cost; cost 
B) frequency; cost 
C) frequency; time 
D) stability; cost 
E) stability; time

Question 13

Given the following process control data for a normally distributed quality variable (three samples of size four each):
   What is the sample mean for sample #1? #2? #3?

Accepted Answer

The answer of Given the following process control data for...

Question 14

Which of the following is not a step in the quality control planning process?

Accepted Answer

A) Define the quality characteristic to be controlled. 
B) Determine a quality control point in the process. 
C) Eliminate all defects found. 
D) Plan how inspection is to be done. 
E) Plan corrective action 
A) Define the quality characteristic to be controlled. 
B) Determine a quality control point in the process. 
C) Eliminate all defects found. 
D) Plan how inspection is to be done. 
E) Plan corrective action

Question 15

A shift in the process mean for a measured quality characteristic would most likely be detected by a(n):

Accepted Answer

A) p-chart 
B) x-bar chart 
C) c-chart 
D) R-chart 
E) s-chart 
A) p-chart 
B) x-bar chart 
C) c-chart 
D) R-chart 
E) s-chart

Question 16

A c-chart is used to monitor the number of defectives in the output of a process.

Accepted Answer

A) True 
 B)False

Question 17

A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under 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:   What is the estimate of the process proportion of defectives based on the samples for these four machines?

Accepted Answer

A) .08 
B) .06 
C) .04 
D) .02 
E) .01 
A) .08 
B) .06 
C) .04 
D) .02 
E) .01

Question 18

Which of the following quality control sample statistics measures a quality characteristic which 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 19

Control limits are specifications established by engineering design or customer requirements.

Accepted Answer

A) True 
 B)False

Question 20

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 under control,package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each with the following results:   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

Control limits distinguish between non-random and assignable variability.

Typically the production of high-cost,low-volume items require little quality control inspection.

A c-chart is used to monitor the number of defects per unit of a process output.

Given the following process control data for a quality attribute (three samples of size 400 each): If the process proportion of defectives is unknown,what is the alpha risk (probability of Type I error)for upper and lower control limits of .115 and .085 respectively? .13 and .07? .145 and .055?

Statistical process control is based on comparing periodic samples from a process to predetermined limits.

Given the following process control data for a quality attribute (three samples of size 400 each): If the process proportion of defectives is unknown,using .10 alpha risk control limits,do any of the sample proportions indicate an out-of-control process proportion of defectives?

Low-cost,high-volume items typically require relatively low levels of inspection.

When using control charts sample frequency is important Sampling frequency can be a function of the __ of a process and the _ to sample.

Given the following process control data for a normally distributed quality variable (three samples of size four each): What is the sample mean for sample #1? #2? #3?

Which of the following is not a step in the quality control planning process?

A shift in the process mean for a measured quality characteristic would most likely be detected by a(n):

A c-chart is used to monitor the number of defectives in the output of a process.

Which of the following quality control sample statistics measures a quality characteristic which is an attribute?

Control limits are specifications established by engineering design or customer requirements.

Introduction to Operations Management

Competitiveness, strategic Planning, and Productivity

Demand Forecasting

Product Design

Reliability

Strategic Capacity Planning

Decision Analysis

Process Design and Facility Layout

Linear Programming

Workjob Design

Learning Curves

Location Planning and Analysis

the Transportation Model

Management of Quality

Acceptance Sampling

Supply Chain Management

Inventory Management

Aggregate Operations Planning and Master Scheduling

Material Requirements Planning and Enterprise Resource Planning

Just-In-Time and Lean Production

Maintenance

Job and Staff Scheduling

Project Management

Waiting-Line Analysis

Simulation

Filters

Exam 15: Statistical Quality Control

Control limits distinguish between non-random and assignable variability.

Typically the production of high-cost,low-volume items require little quality control inspection.

A c-chart is used to monitor the number of defects per unit of a process output.

Given the following process control data for a quality attribute (three samples of size 400 each): If the process proportion of defectives is unknown,what is the alpha risk (probability of Type I error)for upper and lower control limits of .115 and .085 respectively? .13 and .07? .145 and .055?

Statistical process control is based on comparing periodic samples from a process to predetermined limits.

Given the following process control data for a quality attribute (three samples of size 400 each): If the process proportion of defectives is unknown,using .10 alpha risk control limits,do any of the sample proportions indicate an out-of-control process proportion of defectives?

Low-cost,high-volume items typically require relatively low levels of inspection.

When using control charts sample frequency is important Sampling frequency can be a function of the ______ of a process and the _____ to sample.

Given the following process control data for a normally distributed quality variable (three samples of size four each): What is the sample mean for sample #1? #2? #3?

Which of the following is not a step in the quality control planning process?

A shift in the process mean for a measured quality characteristic would most likely be detected by a(n):

A c-chart is used to monitor the number of defectives in the output of a process.

Which of the following quality control sample statistics measures a quality characteristic which is an attribute?

Control limits are specifications established by engineering design or customer requirements.

Introduction to Operations Management

Competitiveness, strategic Planning, and Productivity

Demand Forecasting

Product Design

Reliability

Strategic Capacity Planning

Decision Analysis

Process Design and Facility Layout

Linear Programming

Workjob Design

Learning Curves

Location Planning and Analysis

the Transportation Model

Management of Quality

Acceptance Sampling

Supply Chain Management

Inventory Management

Aggregate Operations Planning and Master Scheduling

Material Requirements Planning and Enterprise Resource Planning

Just-In-Time and Lean Production

Maintenance

Job and Staff Scheduling

Project Management

Waiting-Line Analysis

Simulation

Filters

When using control charts sample frequency is important Sampling frequency can be a function of the __ of a process and the _ to sample.