Applications – OR and Management Sciences

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

    The Vehicle Routing Problem with Access Restrictions

  • Munise Kubra Sahin
    • Categories Applications - OR and Management Sciences, Production and Logistics, Transportation Tags , , , ,

    To mitigate the negative effect of freight vehicles on urban areas, many cities have implemented road accessibility restrictions, including limited traffic zones, which restrict access to specific areas during certain times of the day. Implementing these zones creates a trade-off between the delivery cost and time, even under the assumption of equal traversal time and … Read more

    A Tailored Derivative Instrument to Mitigate the Price-and-Quantity Risk faced by Wind Power Companies

  • Maria de Fatima Lacerda Barbosa
  • Alexandre Street
  • Bruno F. Santos
    • Categories Energy, Finance and Economics Tags , , , , ,

    The intermittent nature of wind generation combined with the well-known volatility of electricity spot prices expose Wind Power Companies (WPCs) committed to long-term forward contracts to the so-called price-and-quantity risk. Several instruments were designed in the past years to mitigate this risk exposure. However, most of them were mainly constructed to cope with only one … Read more

    Sensitivity-based decision support for critical measures using the example of COVID-19 dynamics

  • Falk M. Hante
  • Shanshan Meng
    • Categories Applications - OR and Management Sciences, Optimization of Simulated Systems, Other Topics Tags , , , ,

    We parametrize public policies in the context of the COVID-19 pandemic to evaluate the effectiveness of policies through sensitivity-based methods in order to offer insights into understanding the contributions to critical measures in retrospective. The study utilizes a group-specific SEIR model with a tracing and isolation strategy and vaccination programs. Public policies are applied to … Read more

    A new upper bound of the Euclidean TSP constant

  • Julien Yu
  • John Carlsson
    • Categories Data Science Applications, Transportation Tags , ,

    Let X1, X2, . . . , Xn be n independent and uniformly distributed random points in a compact region R ⊂ R2 of area 1. Let TSP(X1, . . . , Xn) denote the length of the optimal Euclidean traveling salesman tour that traverses all these points. The classical Beardwood-Halton-Hammersley theorem proves the existence … Read more

    Randomized Robust Price Optimization

  • Xinyi Guan
  • Velibor Mišić
    • Categories Applications - OR and Management Sciences, Linear, Cone and Semidefinite Programming, Robust Optimization Tags , ,

    The robust multi-product pricing problem is to determine the prices of a collection of products so as to maximize the worst-case revenue, where the worst case is taken over an uncertainty set of demand models that the firm expects could be realized in practice. A tacit assumption in this approach is that the pricing decision … Read more

    Accreditation, Performance, and Credit Risk in Electricity Capacity Markets

  • Jacob Mays
    • Categories Energy, Finance and Economics Tags , , , ,

    Many liberalized electricity markets use capacity mechanisms to ensure that sufficient resources will be available in advance of operations. Recent events have called into question the ability of capacity mechanisms to provide sufficient incentives for reliability. A core resource adequacy challenge is that, given the high value of reliable electricity, penalties for non-performance on capacity … Read more

    New Formulations and Pricing Mechanisms for Stochastic Electricity Market Clearing Problem

  • Saumya Sakitha Sashrika Ariyarathne
  • Harsha Gangammanavar
    • Categories Applications - OR and Management Sciences, Energy Tags , ,

    We present new formulations of the stochastic electricity market clearing problem based on the principles of stochastic programming. Previous analyses have established that the canonical stochastic programming model effectively captures the relationship between the day-ahead and real-time dispatch and prices. The resulting quantities exhibit desirable guarantees of revenue adequacy, cost recovery, and price distortion in … Read more

    Political districting to optimize the Polsby-Popper compactness score with application to voting rights

  • Pietro Belotti
  • Austin Buchanan
  • Soraya Ezazipour
    • Categories (Mixed) Integer Nonlinear Programming, Applications - OR and Management Sciences, Integer Programming Tags , ,

    In the academic literature and in expert testimony, the Polsby-Popper score is the most popular way to measure the compactness of a political district. Given a district with area \(A\) and perimeter \(P\), its Polsby-Popper score is given by \( (4 \pi A)/P^2\). This score takes values between zero and one, with circular districts achieving … Read more