Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-01-23
In: S. P. Hoogendoorn, S. Luding, P. H. L. Bovy, M. Schreckenberg, and D.E. Wolf (eds.) Traffic and Granular Flow '03 (Springe
Physics
Condensed Matter
Disordered Systems and Neural Networks
For related work see http://www.helbing.org
Scientific paper
The transport of products between different suppliers or production units can be described similarly to driven many-particle and traffic systems. We introduce equations for the flow of goods in supply networks and the adaptation of production speeds. Moreover, we present two examples: The case of linear (sequential) supply chains and the case of re-entrant production. In particular, we discuss the stability conditions, dynamic solutions, and resonance phenomena causing the frequently observed "bullwhip effect", which is an analogue of stop-and-go traffic. Finally, we show how to treat discrete units and cycle times, which can be applied to the description of vehicle queues and travel times in freeway networks.
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