Answered: A graphics reproduction i rm has four…

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 graphics reproduction i rm has four units of equipment that are automatic but occasionally
become inoperative because of the need for supplies, maintenance, or repair. Each
unit requires service roughly twice each hour, or, more precisely, each unit of equipment
runs an average of 30 minutes before needing service. Service times vary widely, ranging
from a simple service (such as pressing a restart switch or repositioning paper) to more
involved equipment disassembly. The average service time, however, is i ve minutes.
Equipment downtime results in a loss of $20 per hour. The one equipment attendant is
paid $6 per hour.
Using i nite queuing analysis, answer the following questions:
a. What is the average number of units in line?
b. What is the average number of units still in operation?
c. What is the average number of units being serviced?
d. The i rm is considering adding another attendant at the same $6 rate. Should the i rm
do it?

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