Simplified approaches to modeling accumulating and nonaccumulating conveyor systems

  • Authors:
  • James O. Henriksen;Thomas J. Schriber

  • Affiliations:
  • Wolverine Software Corporation, 7630 Little River Turnpike, Annandale, VA;Graduate School of Business, The University of Michigan, Ann Arbor, MI

  • Venue:
  • WSC '86 Proceedings of the 18th conference on Winter simulation
  • Year:
  • 1986

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Abstract

In many systems (e.g., manufacturing systems), transportation of work-in-process is accomplished by the use of conveyors. The modeling of objects as they move along conveyors is logically demanding, especially if an object-by-object, inch-by-inch approach is taken. Two alternative and substantially simplified modeling approaches for representing movement of objects on conveyors are presented in this paper: the “minimum travel time” approach is appropriate for accumulating conveyors, and the “follow-the-leader” approach is of use in modeling nonaccumulating conveyors. These modeling approaches are presented in language-independent fashion. The application of the approaches is illustrated through a series of four hypothetical conveyor systems and several variations on them. Models for these conveyor systems are built, implemented in GPSS/H, displayed, and discussed. In a series of exercises, the reader is challenged to build and implement models for these same conveyor systems in whatever alternative simulation language(s) may be of interest.