Exam 4: RELIABILITY – Static

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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 will not occur before 30 months have elapsed?

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(Multiple Choice)

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Question 1

Correct Answer:

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Availability cannot be increased without improving the time between breakdowns.

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(True/False)

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Question 2

Correct Answer:

Verified

False

Suppose a given control unit fails, on average, every 12,000 hours. It takes an average of 900 hours to repair and reboot this unit. The repair/reboot procedures for this unit are being reconfigured. By how much would average repair/reboot time need to be reduced to increase availability by 5 percent (assuming the control unit's average life remains unchanged)?

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(Multiple Choice)

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Question 3

Correct Answer:

Verified

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

(True/False)

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Question 4

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

(True/False)

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Question 5

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 percent reliable. What would the reliability of the appliance be if a backup QK were added?

(Multiple Choice)

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Question 6

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?

(Multiple Choice)

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Question 7

One way to increase overall reliability of a system is to add parts that increase redundancy in the system.

(True/False)

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Question 8

If a system depends on two subsystems functioning when activated, the reliability of that system is equal to that of the less reliable subsystem.

(True/False)

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Question 9

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?

(Multiple Choice)

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Question 10

If the average amount of time a product goes without failing decreased by some amount, that product's availability could nevertheless be maintained at previous levels by its .

(Multiple Choice)

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Question 11

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?

(Multiple Choice)

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Question 12

Showing 1 - 12 of 12

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 will not occur before 30 months have elapsed?

Availability cannot be increased without improving the time between breakdowns.

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

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

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 percent reliable. What would the reliability of the appliance be if a backup QK were added?

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?

One way to increase overall reliability of a system is to add parts that increase redundancy in the system.

If a system depends on two subsystems functioning when activated, the reliability of that system is equal to that of the less reliable subsystem.

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?

If the average amount of time a product goes without failing decreased by some amount, that product's availability could nevertheless be maintained at previous levels by its .

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

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Decision Theory– Static

Process Selection and Facility Layout

Work Design and Measurement

learning curve– Static

Location Planning and Analysis

The Transportation Model– Static

Management of Quality

Quality Control

Acceptance Sampling– Static

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

JIT and Lean Operations

Maintenance– Static

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

Exam 4: RELIABILITY – Static

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 will not occur before 30 months have elapsed?

Availability cannot be increased without improving the time between breakdowns.

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

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

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 percent reliable. What would the reliability of the appliance be if a backup QK were added?

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?

One way to increase overall reliability of a system is to add parts that increase redundancy in the system.

If a system depends on two subsystems functioning when activated, the reliability of that system is equal to that of the less reliable subsystem.

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?

If the average amount of time a product goes without failing decreased by some amount, that product's availability could nevertheless be maintained at previous levels by __________ its __________.

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

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Decision Theory– Static

Process Selection and Facility Layout

Work Design and Measurement

learning curve– Static

Location Planning and Analysis

The Transportation Model– Static

Management of Quality

Quality Control

Acceptance Sampling– Static

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

JIT and Lean Operations

Maintenance– Static

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

If the average amount of time a product goes without failing decreased by some amount, that product's availability could nevertheless be maintained at previous levels by its .