Chapter04s - MSB 354 4S Reliability 5-1 Learning Objectives...

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MSB 354 4S Reliability 5-1
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4S-2 Learning Objectives Define reliability Perform reliability computations Explain the purpose of redundancy in a system
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4S-3 Reliability Reliability : The ability of a product, part, or system to perform its intended function under a prescribed set of conditions. Failure : Situation in which a product, part, or system does not perform as intended Normal operating conditions : T he set of conditions under which an item’s reliability is specified
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4S-4 Probability that the product or system will: Function when activated (focus: one point of time) Function for a given length of time (length of time) E.g., Reliability of 0.9 means that it has a 90% probability of functioning when activated, or functioning 90% of warrant time period. Independent events Events whose occurrence or nonoccurrence do not influence each other. E.g., products or systems consist of independent components. Redundancy The use of backup components to increase reliability Reliability Is a Probability
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Finding the probability of functioning when activated 4S-5
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4S-6 Rule 1 More than 2 events are independent and success is defined as the probabilities that all of the events occur Probability of success = product of probabilities of the events Example .90 .80 Lamp 1 Lamp 2 .90 x .80 = .72
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This note was uploaded on 12/06/2011 for the course MSB 354 taught by Professor Nam during the Fall '11 term at Korea Advanced Institute of Science and Technology.

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Chapter04s - MSB 354 4S Reliability 5-1 Learning Objectives...

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