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Content Provider | ACM Digital Library |
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Author | Assarabowski, Richard J. Sussman, Joseph M. |
Abstract | A practice of increasing importance in the railroad industry is that of dedicating freight cars for the use of a particular shipper. Such cars are said to be in assigned service. Theoretically, assigned fleets should lead to less efficient car utilization because of one-way loaded moves and empty return over the same route. In simplest terms, if the fleet is oversized, cars will always be available for loading and unloading which amounts to “optimal” service. However, utilization of the fleet will be poor since cars will spend a great deal of time waiting to be loaded or unloaded. Thus, costs will escalate. Also, as will be seen, there are strategies available to the railroad(s) providing the service and to the shipper for improving utilization and service for a fleet of a given size. Of course, these strategies can also be used to reduce the fleet size required to provide a given level of service. These strategies are discussed in Section II. A simple simulation model of assigned fleet operation has been described and applied to both a hypothetical set of conditions and a “real-world” situation. The model was useful in studying the trade-offs in the design of a particular assigned fleet. A comparative study of the various available options was carried out and the impact of these options on both the railroad(s) involved and the shipper are now better understood. The hoped for next step is the implementation of these strategies in actual operation practice. |
Starting Page | 257 |
Ending Page | 264 |
Page Count | 8 |
File Format | |
Language | English |
Publisher | Association for Computing Machinery (ACM) |
Publisher Date | 1976-12-06 |
Access Restriction | Subscribed |
Content Type | Text |
Resource Type | Article |
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