A Computer Simulation Model for Determining Fleet Size and Composition

[+] Author and Article Information
G. C. Schultz

Pennsylvania State University, University Park, Pa.

E. E. Enscore

Industrial and Management Systems Engineering, Pennsylvania State University, University Park, Pa.

J. Eng. Ind 99(1), 157-161 (Feb 01, 1977) (5 pages) doi:10.1115/1.3439132 History: Received July 12, 1976; Online July 15, 2010


A heterogeneous vehicle fleet is one that is composed of several types of vehicles. The number of each type of vehicle in the fleet is called the fleet’s composition. The problem of determining the best fleet size and composition for an in-house heterogeneous company fleet having a known demand was solved in this paper. A computer model was developed which tied a fleet simulation model to two different search algorithms. One of the search algorithms is a complete factorial nonsequential search and the other is a combination of a partial factorial nonsequential search and a heuristic sequential hill-climbing search. The objective of both searches is to select the fleet size and composition which provides the lowest total vehicle travel costs to the company. Several examples were used to demonstrate the use of the model.

Copyright © 1977 by ASME
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