Wesley is having a busy afternoon working at the Cool ice cream shop. He is the only employee working because his co-worker for this shift has called in sick. It is a hot summer day and a customer arrives every five minutes on average. Wesley takes an average of four minutes to serve a customer. Assume M/M/1 and FIFO queuing system and no limits on queue size. Select the best choice.   a. Since his average service capacity is greater than the average customer demand, Wesley is never busy at the Cool ice cream place. b. Wesley is busy about 85% of the time at the Cool ice cream place. c. Wesley is busy about 25% of the time at the Cool ice cream place. d. Wesley is idle (i.e., not busy) about 20% of the time at the Cool ice cream place.

Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Wesley is having a busy afternoon working at the Cool ice cream shop. He is the only employee working because his co-worker for this shift has called in sick. It is a hot summer day and a customer arrives every five minutes on average. Wesley takes an average of four minutes to serve a customer. Assume M/M/1 and FIFO queuing system and no limits on queue size. Select the best choice.  


a. Since his average service capacity is greater than the average customer demand, Wesley is never busy at the Cool ice cream place.
b. Wesley is busy about 85% of the time at the Cool ice cream place.
c. Wesley is busy about 25% of the time at the Cool ice cream place.
d. Wesley is idle (i.e., not busy) about 20% of the time at the Cool ice cream place.
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