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Design, construction, and evaluation of a mechanical queueing simulator

ScholarsArchive at Oregon State University

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Title Design, construction, and evaluation of a mechanical queueing simulator
Names Moose, Victor Corson (creator)
Riggs, James L. (advisor)
Date Issued 1966-02-10 (iso8601)
Note Graduation date: 1966
Abstract A machine capable of demonstrating and solving queueing
problems is useful to any systems engineer. This paper describes
a successful queueing simulator constructed from readily available
materials. The machine is easy to operate, portable, and simple
enough to be built in any well equipped machine shop.
The educational values of a queueing simulator are unlimited.
For this reason the paper was oriented towards classroom applications.
Example problems present ample opportunity to compare
theoretical and simulator solutions. Although constant, normal,
and Poisson distributions are illustrated, any arrival or service
pattern is acceptable. More realistic answers are obtained for many
problems because arrival and service rates can be correlated to
queue length. Single-server, multi-server, and multi-stage queues
can be analyzed. This versatility aids conceptual realization required
for system modifications. From the data available, simulator and theoretical solutions
compare reasonably well. When making an industrial waiting line
study a number of proposals must be investigated. By comparing
them on the simulator the most economical one can usually be
chosen. Thus, in addition to being an educational aid, the simulator
is a practical problem solving device.
Principles of operation are visually displayed by schematics
of the electrical and mechanical systems. Queue length is determined
by the number of one-quarter inch steel balls waiting for
service from holes punched in a tape, The number and spacing of
the tape holes represents the desired mathematical distribution.
Tape speeds are controlled by varying the voltages applied to 12
volt motors. Total material cost amounted to $200, External power
is supplied by 110 volt AC current. A step by step operating procedure
is included as a guide for the operator.
Genre Thesis/Dissertation
Topic Queuing theory
Identifier http://hdl.handle.net/1957/48006

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