1 The cost of waiting is estimated to be about an average of $20 per hour. Each pump cost about $11000 per year for the maintenance fee and investment loan interests. Assuming 365 days a year and 12 hours per day. Determine how many new pumps need to be installed to minimize the expected total cost per hour. If no new pumps need to be installed, answer 0. 60 customers per hour (mean arrival rate) and 15 customers per hour (mean service rate)

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 52P
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The cost of waiting is estimated to be about an average of $20 per hour. Each pump cost about $11000 per year for the maintenance fee and investment loan interests. Assuming 365 days a year and 12 hours per day. Determine how many new pumps need to be installed to minimize the expected total cost per hour. If no new pumps need to be installed, answer 0. 60 customers per hour (mean arrival rate) and 15 customers per hour (mean service rate)

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ISBN:
9781337406659
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WINSTON, Wayne L.
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Cengage,