Alan L. Erera

Cross-Dock Trailer Scheduling with Workforce Constraints: A Dynamic Discretization Discovery Approach

  • Ritesh Ojha
  • Alan L. Erera
    • Categories (Mixed) Integer Linear Programming, Scheduling Tags , ,

    LTL freight carriers operate consolidation networks that utilize cross-docking terminals to facilitate thetransfer of freight between trailers and enhance trailer utilization. This research addresses the problem ofdetermining an optimal schedule for unloading inbound trailers at specific unloading doors using teams ofdock workers. The optimization objective is chosen to ensure that outbound trailers are loaded with … Read more

    Optimization-based Learning for Dynamic Load Planning in Trucking Service Networks

  • Ritesh Ojha
  • Reem Khir
  • Alan L. Erera
    • Categories (Mixed) Integer Linear Programming, Production and Logistics, Transportation Tags , ,

    CitationOjha, R., Chen, W., Zhang, H., Khir, R., Erera, A. & Van Hentenryck, P. (2023). Optimization-based Learning for Dynamic Load Planning in Trucking Service Networks.ArticleDownload View PDF

    Integrating Order-to-Delivery Time Sensitivity in E-Commerce Middle-Mile Consolidation Network Design

  • Lacy M. Greening
  • Mathieu Dahan
  • Alan L. Erera
    • Categories Production and Logistics, Supply Chain Management, Transportation Tags , , ,

    This paper proposes an approach that leverages data on customer purchasing sensitivity to quoted order-to-delivery times (ODTs) when designing middle-mile consolidation networks to maximize the profit of e-commerce retailers. Our approach integrates quoted ODT-dependent sales volume predictions into a new mixed-integer program (MIP) that simultaneously determines ODT quotes and a consolidation plan, characterized by the … Read more

    Pricing and Demand Management for Integrated Same-Day and Next-Day Delivery Systems

  • Dipayan Banerjee
  • Alan L. Erera
  • Alejandro Toriello
    • Categories Applications - OR and Management Sciences, Production and Logistics, Supply Chain Management Tags , ,

    We study a system in which a common delivery fleet provides service to both same-day delivery (SDD) and next-day delivery (NDD) orders placed by e-retail customers who are sensitive to delivery prices. We develop a model of the system and optimize with respect to two separate objectives. First, empirical research suggests that fulfilling e-retail orders … Read more

    Courier satisfaction in rapid delivery systems using dynamic operating regions

  • Ramon Auad
  • Alan L. Erera
  • Martin Savelsbergh
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , , , , ,

    Rapid delivery systems where an order is delivered to a customer from a local distribution point within minutes or hours have experienced rapid growth recently and often rely on gig economy couriers. The prime example is a meal delivery system. During an operating day, couriers in such a system are used to deliver orders placed … Read more

    Who Has Access to E-Commerce and When? Time-Varying Service Regions in Same-Day Delivery

  • Dipayan Banerjee
  • Alan L. Erera
  • Alexander Stroh
  • Alejandro Toriello
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , ,

    Motivated by access and equity issues in e-commerce, we study the design of same-day delivery (SDD) systems under the assumption that service regions are allowed to vary over the course of the day; equivalently, that customers in different locations may have access to SDD for different lengths of time over the service day or may … Read more

    Dynamic courier capacity acquisition in rapid delivery systems: a deep Q-learning approach

  • Ramon Auad
  • Alan L. Erera
  • Martin Savelsbergh
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , , , , ,

    With the recent boom of the gig economy, urban delivery systems have experienced substantial demand growth. In such systems, orders are delivered to customers from local distribution points respecting a delivery time promise. An important example is a restaurant meal delivery system, where delivery times are expected to be minutes after an order is placed. … Read more

    Lead-Time-Constrained Middle-Mile Consolidation Network Design with Fixed Origins and Destinations

  • Lacy M. Greening
  • Mathieu Dahan
  • Alan L. Erera
    • Categories Applications - OR and Management Sciences, Transportation Tags , , ,

    Many large e-commerce retailers move sufficient freight volumes to operate private middle-mile consolidation networks for order fulfillment, transporting customer shipments from stocking locations to last-mile delivery partners in consolidated loads to reduce freight costs. We study a middle-mile network design optimization problem with fixed origins and destinations to build load consolidation plans that minimize cost … Read more

    Robust Planning of Sorting Operations in Express Delivery Systems

  • Reem Khir
  • Alan L. Erera
  • Alejandro Toriello
    • Categories Production and Logistics Tags , , ,

    Parcel logistics services play a vital and growing role in economies worldwide, with customers demanding faster delivery of nearly everything to their homes. To move larger volumes more cost effectively, express carriers use sort technologies to consolidate parcels that share similar geographic and service characteristics for reduced per-unit handling and transportation costs. This paper focuses … Read more

    Fleet Sizing and Service Region Partitioning for Same-Day Delivery Systems

  • Dipayan Banerjee
  • Alan L. Erera
  • Alejandro Toriello
    • Categories Applications - OR and Management Sciences, Transportation Tags , , ,

    We study the linked tactical design problems of fleet sizing and partitioning a service region into vehicle routing zones for same-day delivery (SDD) systems. Existing SDD studies focus primarily on operational dispatch problems and do not consider system design questions. Prior work on SDD system design has not considered the fleet sizing decision when a … Read more