Dynamic Pickup and Delivery with Transfers

  • Panagiotis Bouros
  • Dimitris Sacharidis
  • Theodore Dalamagas
  • Timos Sellis
Conference paper

DOI: 10.1007/978-3-642-22922-0_8

Volume 6849 of the book series Lecture Notes in Computer Science (LNCS)
Cite this paper as:
Bouros P., Sacharidis D., Dalamagas T., Sellis T. (2011) Dynamic Pickup and Delivery with Transfers. In: Pfoser D. et al. (eds) Advances in Spatial and Temporal Databases. SSTD 2011. Lecture Notes in Computer Science, vol 6849. Springer, Berlin, Heidelberg

Abstract

In the dynamic Pickup and Delivery Problem with Transfers (dPDPT), a set of transportation requests that arrive at arbitrary times must be assigned to a fleet of vehicles. We use two cost metrics that capture both the company’s and the customer’s viewpoints regarding the quality of an assignment. In most related problems, the rule of thumb is to apply a two-phase local search algorithm to heuristically determine a good requests-to-vehicles assignment. This work proposes a novel solution based on a graph-based formulation of the problem that treats each request independently. Briefly, in this conceptual graph, the goal is to find a shortest path from a node representing the pickup location to that of the delivery location. However, we show that efficient Bellman-Ford or Dijkstra-like algorithms cannot be applied. Still, our method is able to find dPDPT solutions significantly faster than a conventional two-phase local search algorithm, while the quality of the solution is only marginally lower.

Keywords

Pickup and delivery problem dynamic shortest path 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Panagiotis Bouros
    • 1
  • Dimitris Sacharidis
    • 2
  • Theodore Dalamagas
    • 2
  • Timos Sellis
    • 1
    • 2
  1. 1.National Technical University of AthensGreece
  2. 2.Institute for the Management of Information Systems, R.C. “Athena”Greece