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1. What is the effective process time and its CV? 2. If the reset system is not used, failures will occur after 57 hours on average with an average repair time of 3 hours. The CV of repair time is 0.9. What is the effective process time and its CV? Is the maintenance system beneficial if it prevents breakdowns? Just

1. What is the effective process time and its CV? 2. If the reset system is not used, failures will occur after 57 hours on average with an average repair time of 3 hours. The CV of repair time is 0.9. What is the effective process time and its CV? Is the maintenance system beneficial if it prevents breakdowns? Just

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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A fleet repair center resets its computerized diagnostic system after every 15 trucks to help ensure there are limited major downtimes from system failure. The reset takes 22 minutes on average with a CV of 0.3. Each trucks diagnosis takes 28 minutes on average with a CV of 1.75 not considering the resets. 1. What is the effective process time and its CV? 2. If the reset system is not used, failures will occur after 57 hours on average with an average repair time of 3 hours. The CV of repair time is 0.9. What is the effective process time and its CV? Is the maintenance system beneficial if it prevents breakdowns? Just consider effective processing time parameters. 3. The maintenance program costs $10,000 annually. The average profit per car from the diagnostic service is $75. Assume the service center operates 250 days per year, 10 hours per day. Is the maintenance program economically beneficial? What assumptions are needed?
Transcribed Image Text:A fleet repair center resets its computerized diagnostic system after every 15 trucks to help ensure there are limited major downtimes from system failure. The reset takes 22 minutes on average with a CV of 0.3. Each trucks diagnosis takes 28 minutes on average with a CV of 1.75 not considering the resets. 1. What is the effective process time and its CV? 2. If the reset system is not used, failures will occur after 57 hours on average with an average repair time of 3 hours. The CV of repair time is 0.9. What is the effective process time and its CV? Is the maintenance system beneficial if it prevents breakdowns? Just consider effective processing time parameters. 3. The maintenance program costs $10,000 annually. The average profit per car from the diagnostic service is $75. Assume the service center operates 250 days per year, 10 hours per day. Is the maintenance program economically beneficial? What assumptions are needed?
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