fleet planning

Rethinking Last-Mile Routing at Scale: Near-Linear Planning on Commodity Hardware

  • Martin Vizzolini
    • Categories Optimization Software and Modeling Systems, Production and Logistics, Supply Chain Management Tags , , , , , , , , , , , , , ,

    This paper presents a practical architecture for last-mile delivery routing at scales reaching one million stops under realistic operational conditions, including vehicle capacity, package volume, route stop limits, and time windows. Unlike conventional systems that require pre-partitioning or large-scale infrastructure, the proposed system addresses the full fleet planning problem through a single coherent planning pipeline … Read more

    Fleet planning under demand uncertainty: a reinforcement learning approach

  • Mathias de Koning
  • Bruno F. Santos
    • Categories Airline Optimization Tags , , ,

    This work proposes a model-free reinforcement learning approach to learn a long-term fleet planning problem subjected to air-travel demand uncertainty. The aim is to develop a dynamic fleet policy that adapts over time by intermediate assessments of the states. A Deep Q-network is trained to estimate the optimal fleet decisions based on the airline and … Read more

    Bulk Ship Fleet Renewal and Deployment under Uncertainty: A Multi-Stage Stochastic Programming Approach

  • Ayse Nur Arslan
  • Dimitri J. Papageorgiou
    • Categories Stochastic Programming, Supply Chain Management, Transportation Tags , , , , ,

    We study a maritime fleet renewal and deployment problem under demand and charter cost uncertainty. A decision-maker for an industrial bulk shipping company must determine a suitable fleet size, mix, and deployment strategy to satisfy stochastic demand over a given planning horizon. She may acquire vessels in two ways: time chartering and voyage chartering. Time … Read more