Tom Van Woensel

Collection points placement in urban delivery: A game-theoretic analysis of public and competitive strategies

  • Fabio Mercurio
  • Margarida Carvalho
  • S.U.K Rohmer
  • Loe Schlicher
  • Tom Van Woensel
    • Categories Facility Planning and Design, Game Theory Tags , , , ,

    Collection point networks are rapidly expanding as delivery companies and public authorities promote their implementation to consolidate deliveries and reduce urban congestion. However, rather than catering to public interest by maximizing accessibility, the placement of collection points remains primarily driven by competition among delivery companies, which seek to maximize their market share. This paper thus … Read more

    Data-driven robust menu planning for food services: Reducing food waste by using leftovers

  • Marloes Remijnse
  • Marjolein Buisman
  • Ahmadreza Marandi
  • S.U.K Rohmer
  • Tom Van Woensel
    • Categories (Mixed) Integer Linear Programming, Applications - OR and Management Sciences, Robust Optimization Tags , , , ,

    With food waste levels of about 30%, mostly caused by overproduction, reducing food waste poses an important challenge in the food service sector. As food is prepared in advance rather than on demand, there is a significant risk that meals or meal components remain uneaten. Flexible meal planning can promote the reuse of these leftovers … Read more

    Fair stochastic vehicle routing with partial deliveries

  • Natasja Sluijk
  • Walter Rei
  • Joris Kinable
  • Michel Gendreau
  • Tom Van Woensel
    • Categories Branch and Cut Algorithms, Stochastic Programming, Transportation Tags , , ,

    A common assumption in the models for the vehicle routing problem with stochastic demands is that all demands must be satisfied. This is achieved by including recourse actions in two-stage stochastic programming formulations or by ensuring with a high probability that all demand fits within the vehicle capacity (chance-constrained formulations). In this work, we relax … Read more

    Cooperative locker locations games

  • Fabio Mercurio
  • Loe Schlicher
  • S.U.K Rohmer
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Game Theory, Other Topics Tags , ,

    More and more people order products online and have parcels delivered to their homes. This leads to more congestion, negatively impacting the environment, public health, and safety. Carriers can use parcel lockers to consolidate and serve their customers to reduce these negative impacts. The implementation of a locker network can, however, be financially challenging. To … Read more

    A Chance-Constrained Two-Echelon Vehicle Routing Problem with Stochastic Demands

  • Nico Dellaert
  • Joris Kinable
  • Alexandre M. Florio
  • Natasja Sluijk
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Transportation Tags , , ,

    Two-echelon distribution systems are often considered in city logistics to maintain economies of scale and satisfy the emission zone requirements in the cities. In this work, we formulate the two-echelon vehicle routing problem with stochastic demands as a chance-constrained stochastic optimization problem, where the total demand of the customers in each second-echelon route should fit … Read more

    The Fuel Replenishment Problem:A Split-Delivery Multi-Compartment Vehicle Routing Problem with Multiple Trips

  • Joris Kinable
  • Li Wang
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Transportation Tags , , , , ,

    In this paper, we formally define and model the Fuel Replenishment Problem (FRP). The FRP is a multi-compartment, multi-trip, split-delivery VRP in which tanker trucks transport different types of petrol, separated over multiple vehicle compartments, from an oil depot to petrol stations. Large customer demands often necessitate multiple deliveries. Throughout a single working day, a … Read more

    A Scenario-Based Approach for the Vehicle Routing Problem with Roaming Delivery Locations under Stochastic Travel Times

  • Joris Kinable
  • Afonso Sampaio
  • Lucas Veelenturf
  • Tom Van Woensel
    • Categories Meta Heuristics, Stochastic Programming, Transportation Tags , ,

    We address a stochastic variant of the Vehicle Routing Problem with Roaming Delivery Locations. In this model, direct-to-consumer deliveries can be made in the trunk of the customer’s car, while the vehicle is parked at a location along the customer’s itinerary. The stochasticity arises from the uncertainty in travel times and the problem is formulated … Read more

    The Benefits of Transfers in Crowdsourced Pickup-and-Delivery Systems

  • Afonso Sampaio
  • Martin Savelsbergh
  • Lucas Veelenturf
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Meta Heuristics, Transportation Tags , , ,

    Rapid urban growth, the increasing importance of e-commerce and high consumer service expectations have given rise to new and innovative models for freight delivery within urban environments. Crowdsourced solutions – where drivers are not employed by a carrier but occasionally offer their services through on-line platforms and are contracted as required by carriers – are … Read more

    Crowd-based City Logistics

  • Afonso Sampaio
  • Martin Savelsbergh
  • Lucas Veelenturf
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , , , , ,

    Cities are drivers of economic development, providing infrastructure to support countless activities and services. Today, the world’s 750 biggest cities account for more than 57% of the global GDP and this number is expected to increase to 61% by 2030. More than half of the world’s population lives in cities, or urban areas, and this … Read more

    City Logistics: Challenges and Opportunities

  • Martin Savelsbergh
  • Tom Van Woensel
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , , , , , ,

    Today, around 54% of the world’s population lives in urban areas. By 2050, this share is expected to go up significantly. As a result, city logistics, which focuses on the efficient and effective transportation of goods in urban areas while taking into account the negative effects on congestion, safety, and environment, is critical to ensuring … Read more