Question 1

What is the approximate useful life in hours for a product having a reliability of 0.9978 and a failure rate of 0.001 failures per hour?

Accepted Answer

A) 6120 
B) 5600 
C) 5000 
D) 4400 
E) 3800 
A) 6120 
B) 5600 
C) 5000 
D) 4400 
E) 3800

Question 2

What is the reliability of a product with a failure rate of 0.002 per operating hour and a useful life of 1000 hours?

Accepted Answer

A) 0.14 
B) 0.22 
C) 0.50 
D) 0.78 
E) 0.86 
A) 0.14 
B) 0.22 
C) 0.50 
D) 0.78 
E) 0.86

Question 3

The horizontal axis on the bathtub curve is reliability.

Accepted Answer

A) True 
 B)False

Question 4

The lower control limit for a p chart cannot be lower than zero.

Accepted Answer

A) True 
 B)False

Question 5

What is the system availability for something that has a mean time between failures of 50 hours and needs an average of 1 hour to repair when it does fail?

Accepted Answer

A) 0.98 
B) 0.92 
C) 0.86 
D) 0.80 
E) 0.74 
A) 0.98 
B) 0.92 
C) 0.86 
D) 0.80 
E) 0.74

Question 6

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What is the average proportion defective?

Accepted Answer

A) 0.07 
B) 0.14 
C) 0.21 
D) 0.28 
E) 0.35 
A) 0.07 
B) 0.14 
C) 0.21 
D) 0.28 
E) 0.35

Question 7

What is the useful life in hours for a product having a reliability of 0.985 and a failure rate of 0.015 failures per hour?

Accepted Answer

A) 120 
B) 200 
C) 280 
D) 360 
E) 440 
A) 120 
B) 200 
C) 280 
D) 360 
E) 440

Question 8

Production-related attributes are more important to quality managers than customer-based attributes.

Accepted Answer

A) True 
 B)False

Question 9

System unreliability is increased with ________.

Accepted Answer

A) a redundant system 
B) a parallel system 
C) a backup system 
D) high reliability components 
E) low reliability components 
A) a redundant system 
B) a parallel system 
C) a backup system 
D) high reliability components 
E) low reliability components

Question 10

An insurance claims department employs 10 claims adjusters who spend all day verifying that forms are valid and have been completed correctly. Forms with mistakes are useless and must be returned to the adjuster who must contact the customer again and resubmit the claim. The supervisor reviews two claims processed by each employee to verify that the process is working at acceptable levels.
How should the process be monitored? Explain your reasoning.

Accepted Answer

Defects or defectives?
Evidently the cla

Question 11

Customer-based attributes are internal and engineering-oriented.

Accepted Answer

A) True 
 B)False

Question 12

In order to determine system availability, you will need both the mean time to failure and the mean time between failures.

Accepted Answer

A) True 
 B)False

Question 13

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What are the lower and upper 3-sigma control limits?

Accepted Answer

A) (-0.01, 0.09) 
B) (-0.01, 0.00) 
C) (-0.01, 0.29) 
D) (0.00, 0.09) 
E) (0.00, 0.29) 
A) (-0.01, 0.09) 
B) (-0.01, 0.00) 
C) (-0.01, 0.29) 
D) (0.00, 0.09) 
E) (0.00, 0.29)

Question 14

The np chart is a graph of the number of defectives in a subgroup.

Accepted Answer

A) True 
 B)False

Question 15

A painter paints a wall and when too much paint is applied, drips result. In the language of attribute charts, the drips are ________.

Accepted Answer

A) defectives 
B) defects 
C) variables 
D) critical 
E) temporal 
A) defectives 
B) defects 
C) variables 
D) critical 
E) temporal

Question 16

What is the system availability for something that has a mean time between failures of 168 hours and needs an average of 48 hours to repair when it does fail?

Accepted Answer

A) 0.98 
B) 0.93 
C) 0.88 
D) 0.83 
E) 0.78 
A) 0.98 
B) 0.93 
C) 0.88 
D) 0.83 
E) 0.78

Question 17

Reliability models assume statistical independence between failure events. This means that ________.

Accepted Answer

A) components do not fail 
B) if one component fails, the entire system fails 
C) parallel systems are unnecessary 
D) the failure of one component does not influence another to fail 
E) series systems are unnecessary 
A) components do not fail 
B) if one component fails, the entire system fails 
C) parallel systems are unnecessary 
D) the failure of one component does not influence another to fail 
E) series systems are unnecessary

Question 18

________ attributes relate to the physical characteristics of a particular product or service.

Accepted Answer

A) Structural 
B) Sensory 
C) Performance 
D) Temporal 
E) Ethical 
A) Structural 
B) Sensory 
C) Performance 
D) Temporal 
E) Ethical

Question 19

The producers of the Yugo automobile periodically inspect samples of 80 hoods for dents and scratches. A single flaw in a hood renders it unsuitable for installation in one of their fine automobiles. The results of the last 10 samples are shown.. What are the lower and upper control limits for the np chart?

Accepted Answer

A) (-8.35, 2.8) 
B) (2.8, 8.35) 
C) (0.3, 17.1) 
D) (8.7, 17.1) 
E) (0.4, 8.7) 
A) (-8.35, 2.8) 
B) (2.8, 8.35) 
C) (0.3, 17.1) 
D) (8.7, 17.1) 
E) (0.4, 8.7)

Question 20

The reliability of components in series is the product of their individual reliabilities. What implications does this have for the Space Shuttle?

Accepted Answer

The Space Shuttle has a large number of

What is the approximate useful life in hours for a product having a reliability of 0.9978 and a failure rate of 0.001 failures per hour?

What is the reliability of a product with a failure rate of 0.002 per operating hour and a useful life of 1000 hours?

The horizontal axis on the bathtub curve is reliability.

The lower control limit for a p chart cannot be lower than zero.

What is the system availability for something that has a mean time between failures of 50 hours and needs an average of 1 hour to repair when it does fail?

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What is the average proportion defective?

What is the useful life in hours for a product having a reliability of 0.985 and a failure rate of 0.015 failures per hour?

Production-related attributes are more important to quality managers than customer-based attributes.

System unreliability is increased with ________.

Customer-based attributes are internal and engineering-oriented.

In order to determine system availability, you will need both the mean time to failure and the mean time between failures.

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What are the lower and upper 3-sigma control limits?

The np chart is a graph of the number of defectives in a subgroup.

A painter paints a wall and when too much paint is applied, drips result. In the language of attribute charts, the drips are ________.

What is the system availability for something that has a mean time between failures of 168 hours and needs an average of 48 hours to repair when it does fail?

Reliability models assume statistical independence between failure events. This means that ________.

________ attributes relate to the physical characteristics of a particular product or service.

The reliability of components in series is the product of their individual reliabilities. What implications does this have for the Space Shuttle?

Differing Perspectives on Quality

Quality Theory

Global Supply Chain Quality and International Quality Standards

Strategic Quality Planning

The Voice of the Customer

The Voice of the Market

Quality and Innovation in Product and Process Design

Designing Quality Services

Managing Supplier Quality in the Supply Chain

The Tools of Quality

Statistically Based Quality Improvement for Variables

Six Sigma Management and Lean Tools

Managing Quality Improvement Teams and Projects

Implementing and Validating the Quality System

Filters

Exam 12: Statistically Based Quality Improvement for Attributes

What is the approximate useful life in hours for a product having a reliability of 0.9978 and a failure rate of 0.001 failures per hour?

What is the reliability of a product with a failure rate of 0.002 per operating hour and a useful life of 1000 hours?

The horizontal axis on the bathtub curve is reliability.

The lower control limit for a p chart cannot be lower than zero.

What is the system availability for something that has a mean time between failures of 50 hours and needs an average of 1 hour to repair when it does fail?

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What is the average proportion defective?

What is the useful life in hours for a product having a reliability of 0.985 and a failure rate of 0.015 failures per hour?

Production-related attributes are more important to quality managers than customer-based attributes.

System unreliability is increased with ________.

Customer-based attributes are internal and engineering-oriented.

In order to determine system availability, you will need both the mean time to failure and the mean time between failures.

A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown. What are the lower and upper 3-sigma control limits?

The np chart is a graph of the number of defectives in a subgroup.

A painter paints a wall and when too much paint is applied, drips result. In the language of attribute charts, the drips are ________.

What is the system availability for something that has a mean time between failures of 168 hours and needs an average of 48 hours to repair when it does fail?

Reliability models assume statistical independence between failure events. This means that ________.

________ attributes relate to the physical characteristics of a particular product or service.

The reliability of components in series is the product of their individual reliabilities. What implications does this have for the Space Shuttle?

Differing Perspectives on Quality

Quality Theory

Global Supply Chain Quality and International Quality Standards

Strategic Quality Planning

The Voice of the Customer

The Voice of the Market

Quality and Innovation in Product and Process Design

Designing Quality Services

Managing Supplier Quality in the Supply Chain

The Tools of Quality

Statistically Based Quality Improvement for Variables

Six Sigma Management and Lean Tools

Managing Quality Improvement Teams and Projects

Implementing and Validating the Quality System

Filters