Answered: An engineering i rm retains a technical…

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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An engineering i rm retains a technical specialist to assist four design engineers working
on a project. The help that the specialist gives engineers ranges widely in time consumption.
The specialist has some answers available in memory, others require computation,
and still others require signii cant search time. On the average, each request for assistance
takes the specialist one hour.
The engineers require help from the specialist on the average of once each day. Because
each assistance takes about an hour, each engineer can work for seven hours, on the average,
without assistance. One further point: Engineers needing help do not interrupt if the
specialist is already involved with another problem.
Treat this as a i nite queuing problem and answer the following questions:
a. How many engineers, on average, are waiting for the technical specialist for help?
b. What is the average time that an engineer has to wait for the specialist?
c. What is the probability that an engineer will have to wait in line for the specialist?

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