HEC Montréal, Canada, May 2 - 4, 2011

2011 Optimization Days

HEC Montréal, Canada, 2 — 4 May 2011

Schedule Authors My Schedule

WA6 Transport / Transportation

May 4, 2011 10:30 AM – 12:10 PM

Location: Gérard-Parizeau

Chaired by Jacques Renaud

4 Presentations

  • 10:30 AM - 10:55 AM

    A Reputation-Based Model for Transportation Auctions

    • Monia Rekik, presenter, Université Laval
    • Sehl Mellouli, Université Laval

    We propose a reputation-based model for winner determination problem in transportation procurement auctions where the allocation of long-term contracts to carriers is decided with respect to both bid ask prices and carriers reputation. The objective is to manage the trade-of between transport costs and the quality of service during operations. Computational results obtained by our model prove the importance of considering reputation in transportation auctions while selecting winning carriers.

  • 10:55 AM - 11:20 AM

    A Survey on Maritime Fleet Size and Mix Problems

    • Giovanni Pantuso, presenter, Norwegian University of Science and Technology
    • Kjetil Fagerholt, Norwegian University of Science and Technology
    • Lars Magnus Hvattum, The Norwegian University of Science and Technology

    This talk presents a survey on maritime fleet size and mix problems. A typical, though simplified, version of the problem, is presented, including a mathematical formulation. The literature is surveyed and open research questions are discussed. The effect of including uncertainty is illustrated in the example problem.

  • 11:20 AM - 11:45 AM

    An Efficient Heuristic Approach for Fast Courier Fleet Management

    • Jacques Renaud, presenter, Université Laval, CIRRELT
    • Angel Ruiz, Université Laval

    Fast courier services are provided by very specialized transportation companies to move letters and parcels within a given urban area in very short time. This paper focuses on the operations of a Quebec City’s company which performs daily around 1 000 requests. We developed a system which able us to evaluate the quality of the dispatching process. We also provide insights on the global improvements that may be obtained if a closer collaboration would be done with the major clients.

  • 11:45 AM - 12:10 PM

    Self-Imposed Time Windows in Vehicle Routing Problems

    • Ola Jabali, presenter, École Polytechnique de Montréal
    • Roel Leus, Katholieke Universiteit Leuven
    • Tom Van Woensel, Eindhoven University of Technology
    • A.G. (Ton) de Kok, Eindhoven University of Technology

    Self-Imposed Time Windows (SITW) occur when a logistics service provider quotes a delivery time window to his customers. We incorporate SITW within the framework of the Vehicle Routing Problem (VRP). We propose a heuristic solution approach combining a LP model with a tabu search procedure.