Question 1

Redundancy is often more cost-effective than increasing individual component reliability.

Accepted Answer

A) True 
 B)False  True

Question 2

An electrical appliance will not work unless component QK does.Component QK's reliability is 0.95.Every other part of the appliance is 100% reliable.What would the reliability of the appliance be if a backup QK were added?

Accepted Answer

A) .95 
B) .9975 
C) .9025 
D) .9205 
E) .9795 
A) .95 
B) .9975 
C) .9025 
D) .9205 
E) .9795 B

Question 3

If a system depends on two sub-systems functioning when activated, the reliability of that system is equal to the lower reliability of the two sub-systems.

Accepted Answer

A) True 
 B)False  False

Question 4

The time between failures for an electrical appliance is exponentially distributed with a mean of 25 months.What is the probability that the next failure won't occur before 30 months have elapsed?

Accepted Answer

A) Not in excess of .2 
B) In excess of .2 but not in excess of .3 
C) In excess of .3 but not in excess of .4 
D) In excess of .4 but not in excess of .6 
E) In excess of .6 
A) Not in excess of .2 
B) In excess of .2 but not in excess of .3 
C) In excess of .3 but not in excess of .4 
D) In excess of .4 but not in excess of .6 
E) In excess of .6

Question 5

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.The components are independent of one another with respect to reliability.What is the overall system reliability?

Accepted Answer

A) .99 
B) .95 
C) .94 
D) .90 
E) Cannot be determined with this information. 
A) .99 
B) .95 
C) .94 
D) .90 
E) Cannot be determined with this information.

Question 6

Availability cannot be increased without improving the time between breakdowns.

Accepted Answer

A) True 
 B)False

Question 7

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.What is the overall system reliability?

Accepted Answer

A) .99 
B) .95 
C) .94 
D) .90 
E) Cannot be determined with this information. 
A) .99 
B) .95 
C) .94 
D) .90 
E) Cannot be determined with this information.

Question 8

Product reliability involves both short-term and long-term perspectives.

Accepted Answer

A) True 
 B)False

Question 9

Reliability is the probability that a product or system will function when activated.

Accepted Answer

A) True 
 B)False

Question 10

Waygate's residential internet modem works well but is sensitive to power-line fluctuations.On average, this product hangs up and needs resetting every 200 hours.On average about 45 minutes is needed to reset this product.What is this product's availability?

Accepted Answer

A) Not in excess of .75 
B) In excess of .75 but not in excess of .8 
C) In excess of .8 but not in excess of .9 
D) In excess of .9 but not in excess of .95 
E) In excess of .95 
A) Not in excess of .75 
B) In excess of .75 but not in excess of .8 
C) In excess of .8 but not in excess of .9 
D) In excess of .9 but not in excess of .95 
E) In excess of .95

Redundancy is often more cost-effective than increasing individual component reliability.

An electrical appliance will not work unless component QK does.Component QK's reliability is 0.95.Every other part of the appliance is 100% reliable.What would the reliability of the appliance be if a backup QK were added?

If a system depends on two sub-systems functioning when activated, the reliability of that system is equal to the lower reliability of the two sub-systems.

The time between failures for an electrical appliance is exponentially distributed with a mean of 25 months.What is the probability that the next failure won't occur before 30 months have elapsed?

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.The components are independent of one another with respect to reliability.What is the overall system reliability?

Availability cannot be increased without improving the time between breakdowns.

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.What is the overall system reliability?

Product reliability involves both short-term and long-term perspectives.

Reliability is the probability that a product or system will function when activated.

Waygate's residential internet modem works well but is sensitive to power-line fluctuations.On average, this product hangs up and needs resetting every 200 hours.On average about 45 minutes is needed to reset this product.What is this product's availability?

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

Quality Control

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Extension 5: Decision Theory

Extension 7: Learning Curves

Extension 8: The Transportation Model

Extension 10: Acceptance Sampling

Extension 14: Maintenance

Filters

Exam 20: Extension 4: Reliability

Redundancy is often more cost-effective than increasing individual component reliability.

An electrical appliance will not work unless component QK does.Component QK's reliability is 0.95.Every other part of the appliance is 100% reliable.What would the reliability of the appliance be if a backup QK were added?

If a system depends on two sub-systems functioning when activated, the reliability of that system is equal to the lower reliability of the two sub-systems.

The time between failures for an electrical appliance is exponentially distributed with a mean of 25 months.What is the probability that the next failure won't occur before 30 months have elapsed?

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.The components are independent of one another with respect to reliability.What is the overall system reliability?

Availability cannot be increased without improving the time between breakdowns.

A system consists of two components, each of which must activate if the system is to activate.One component has a reliability of .99.The other has a reliability of .95.What is the overall system reliability?

Product reliability involves both short-term and long-term perspectives.

Reliability is the probability that a product or system will function when activated.

Waygate's residential internet modem works well but is sensitive to power-line fluctuations.On average, this product hangs up and needs resetting every 200 hours.On average about 45 minutes is needed to reset this product.What is this product's availability?

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

Quality Control

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Extension 5: Decision Theory

Extension 7: Learning Curves

Extension 8: The Transportation Model

Extension 10: Acceptance Sampling

Extension 14: Maintenance

Filters