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The Penalty of Cyclic Queues in Operating Processes with Freight Trains at Formation Yards

Lookup NU author(s): Dr Marin Marinov



The inside of the throughput line at formation yards is the Process of Freight Train Making (PTM). Elaborating on its characteristics and specificities one might identify a specific category of queueing systems. This category is bulk service queues, meaning similar customers are served in batches. For this discussion the customers are freight cars. Freight cars are set up into freight car groups i.e., batches. These freight car groups are coupled in order to form the freight trains. The freight train consists of one or more freight car groups. This is the crux of the PTM. Theoretically, this question might seem simple. One should merely define which freight car group(s) should go with which freight train. Practically, this question is not simple at all. Considering how a bulk service process operates, one might be easily convinced of it. Bulk service is characterized with cyclic recurrence and has a negative consequence seen in cyclic queues. In this paper we scrutinize the penalty of cyclic queues in operating processes with freight trains at formation yards by demonstrating the frame of reference and a set of effective strategies for planning of the process of freight train making. Adequate measures of performance in use are: gathering time, similar in meaning to waiting times, and time in cyclic queue, effectively the time in system.

Publication metadata

Author(s): Marinov M

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Seventh International Congress on Advances in Civil Engineering

Year of Conference: 2006

Pages: CD-ROM

Date deposited: 15/01/2010

Notes: Publication in Turkish