Question 1

The inverse of the mean time between failures is the ________.

Accepted Answer

number of failures d

Question 2

The ________ takes into account such costs as deteriorated customer relations and lost sales.

Accepted Answer

full cost

Question 3

Identify the two reliability tactics and the two maintenance tactics.

Accepted Answer

The reliability tactics are: (1)improvin

Question 4

What is FR(N)? How is it calculated? How are FR(N)and MTBF related?

Accepted Answer

FR(N)is the number of failures

Question 5

The objective of maintenance and reliability is to maintain the capability of the system.

Accepted Answer

A) True 
 B)False

Question 6

________ is a plan that involves routine inspections,servicing,and keeping facilities in good repair to prevent failure.

Accepted Answer

Preventive

Question 7

A system has four components in a series.What is the reliability of the system?

Accepted Answer

(0.90)(0.9

Question 8

"High reliability can be achieved in a product without having high reliability in the component parts.In fact,any reliability target,no matter how high,can be achieved with only mediocre parts,so long as enough of them are present." Discuss;an example may help.

Accepted Answer

This carries the redundancy concept one

Question 9

Reliability is the probability that a machine part or product will function properly for a specified time regardless of conditions.

Accepted Answer

A) True 
 B)False

Question 10

Preventive maintenance implies that we can determine when a system needs service or will need repair.

Accepted Answer

A) True 
 B)False

Question 11

DuLarge Marine manufactures diesel engines for shrimp trawlers and other small commercial boats.One of their CNC machines has caused several problems.Over the past 30 weeks,the machine has broken down as indicated below.Each time the machine breaks down,the firm loses an average of $3,000 in time and repair expenses.If preventive maintenance were implemented,it is estimated that an average of only one breakdown per week would occur.The cost of preventive maintenance is $1,000 per week.   What is the weekly total maintenance cost of this program?

Accepted Answer

A) $1,000 
B) $3,000 
C) $4,000 
D) $6,000 
E) $8,000 
A) $1,000 
B) $3,000 
C) $4,000 
D) $6,000 
E) $8,000

Question 12

A job consists of a series of three tasks.Task 1 is performed correctly 98% of the time,task 2 is performed correctly 99% of the time,and task 3 is performed correctly 97% of the time.What is the reliability of this job?

Accepted Answer

A) 91.27% 
B) 94.11% 
C) 97.00% 
D) 98.00% 
E) 99.00% 
A) 91.27% 
B) 94.11% 
C) 97.00% 
D) 98.00% 
E) 99.00%

Question 13

Maintenance includes all activities involved in keeping a system's equipment in working order.

Accepted Answer

A) True 
 B)False

Question 14

A manager is comparing the total maintenance (preventive plus breakdown)cost curves for two scenarios.The graphs have maintenance commitment on the x-axis and costs on the y-axis.Scenario A includes the direct breakdown maintenance costs,while Scenario B includes the "full" (direct and indirect)breakdown maintenance costs.Which of the following should the manager notice when going from Scenario A to Scenario B?

Accepted Answer

A) Total cost is decreased. 
B) Optimal point is moved to the left. 
C) Optimal point is moved to the right. 
D) Preventative maintenance cost slope is increased. 
E) None of the above 
A) Total cost is decreased. 
B) Optimal point is moved to the left. 
C) Optimal point is moved to the right. 
D) Preventative maintenance cost slope is increased. 
E) None of the above

Question 15

________ consists of all activities involved in keeping a system's equipment in working order.

Accepted Answer

The answer of ________ consists of all activities involved in...

Question 16

A simple electrical motor has three components: windings,armature,and housing.These three components have reliabilities of .97,.992,and .999.There is no possibility of redundant parts.The motor must have an overall reliability of at least 0.980,according to the product line manager who will use the motor as an input.What would you do to redesign the motor to meet this specification? Discuss,including a recalculation to meet the standard.

Accepted Answer

Since no backup is possible,individual c

Question 17

An optimal maintenance policy strikes a balance between the costs of breakdown and preventive maintenance so that the total cost of maintenance is at a minimum.

Accepted Answer

A) True 
 B)False

Question 18

Infant mortality refers to which one of the following examples?

Accepted Answer

A) high frequency on the left side of the MTBF distribution 
B) failure of items used in the nursery ward of a hospital 
C) failure of products with a very short life cycle 
D) market failure of brand new products 
E) high failure rate often encountered in the very early stages of the lifetime of a product 
A) high frequency on the left side of the MTBF distribution 
B) failure of items used in the nursery ward of a hospital 
C) failure of products with a very short life cycle 
D) market failure of brand new products 
E) high failure rate often encountered in the very early stages of the lifetime of a product

Question 19

Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours;another failed at 140 hours;all others completed the test.FR(%)is ________ and MTBF is ________.

Accepted Answer

A) 20%;880 hours 
B) 10%;1980 hours 
C) 20%;1760 hours 
D) 20%;1000 hours 
E) 80%;920 hours 
A) 20%;880 hours 
B) 10%;1980 hours 
C) 20%;1760 hours 
D) 20%;1000 hours 
E) 80%;920 hours

Question 20

Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is ________ and FR(N)is ________.

Accepted Answer

A) 10%;1/1850 
B) 10%;1/2000 
C) 25%;1850 hours 
D) 90%;1/2000 
E) 10%;1/1950 
A) 10%;1/1850 
B) 10%;1/2000 
C) 25%;1850 hours 
D) 90%;1/2000 
E) 10%;1/1950

Exam 17: Maintenance and Reliability

The inverse of the mean time between failures is the ________.

The ________ takes into account such costs as deteriorated customer relations and lost sales.

Identify the two reliability tactics and the two maintenance tactics.

What is FR(N)? How is it calculated? How are FR(N)and MTBF related?

The objective of maintenance and reliability is to maintain the capability of the system.

________ is a plan that involves routine inspections,servicing,and keeping facilities in good repair to prevent failure.

A system has four components in a series.What is the reliability of the system?

"High reliability can be achieved in a product without having high reliability in the component parts.In fact,any reliability target,no matter how high,can be achieved with only mediocre parts,so long as enough of them are present." Discuss;an example may help.

Reliability is the probability that a machine part or product will function properly for a specified time regardless of conditions.

Preventive maintenance implies that we can determine when a system needs service or will need repair.

A job consists of a series of three tasks.Task 1 is performed correctly 98% of the time,task 2 is performed correctly 99% of the time,and task 3 is performed correctly 97% of the time.What is the reliability of this job?

Maintenance includes all activities involved in keeping a system's equipment in working order.

________ consists of all activities involved in keeping a system's equipment in working order.

An optimal maintenance policy strikes a balance between the costs of breakdown and preventive maintenance so that the total cost of maintenance is at a minimum.

Infant mortality refers to which one of the following examples?

Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours;another failed at 140 hours;all others completed the test.FR(%)is ________ and MTBF is ________.

Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is ________ and FR(N)is ________.

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy

Location Strategies

Layout Strategies

Human Resources,job Design,and Work Measurement

Supply Chain Management

Inventory Management

Aggregate Planning and Sop

Material Requirements Planning Mrpand ERP

Short-Term Scheduling

Lean Operations

Sustainability in the Supply Chain

Statistical Process Control

Capacity and Constraint Management

Supply Chain Management Analytics

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters

Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours;another failed at 140 hours;all others completed the test.FR(%)is and MTBF is .

Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is and FR(N)is .