Supply Chain Management

Risk Aversion to Parameter Uncertainty in Markov Decision Processes with an Application to Slow-Onset Disaster Relief

  • Simge Küçükyavuz
  • Merve Merakli
    • Categories Integer Programming, Stochastic Programming, Supply Chain Management Tags , , , , ,

    In classical Markov Decision Processes (MDPs), action costs and transition probabilities are assumed to be known, although an accurate estimation of these parameters is often not possible in practice. This study addresses MDPs under cost and transition probability uncertainty and aims to provide a mathematical framework to obtain policies minimizing the risk of high long-term … Read more

    Policies for Inventory Models with Product Returns Forecast from Past Demands and Past Sales

  • Mabel C. Chou
  • Chee-Khian Sim
  • Xiao-Ming Yuan
    • Categories Dynamic Programming, Supply Chain Management

    Finite horizon periodic review backlog models are considered in this paper for an inventory system that remanufactures two types of cores: buyback cores and normal cores. Returns of used products as buyback cores are modelled to depend on past demands and past sales. We obtain an optimal inventory policy for the model in which returns … Read more

    Analysis of Process Flexibility Designs under Disruptions

  • Hoda Bidkhori
  • Oleg A. Prokopyev
  • Erfan Mehmanchi
    • Categories Production and Logistics, Robust Optimization, Supply Chain Management Tags , , , ,

    Most of the previous studies of process flexibility designs have focused on expected sales and demand uncertainty. In this paper, we examine the worst-case performance of flexibility designs in the case of demand and supply uncertainties, where the latter can be in the form of either plant or arc disruptions. We define the Plant Cover … Read more

    Heuristic Methods for The Capacitated Stochastic Lot-Sizing Problem Under The Static-Dynamic Uncertainty Strategy

  • M.K. Dogru
  • Cem Iyigun
  • A.C. Randa
  • U. Ozen
    • Categories Combinatorial Optimization, Supply Chain Management Tags , , , ,

    We consider a lot-sizing problem in a single-item single-stage production system facing non-stationary stochastic demand in a nite planning horizon. Motivated by practice, the set-up times need to be deter- mined and frozen once and for all at the beginning of the horizon while decisions on the exact lot sizes can be deferred until the … Read more

    Model and exact solution for a two-echelon inventory routing problem

  • Katyanne Farias
  • Khaled Hadj-Hamou
  • Claude Yugma
    • Categories Branch and Cut Algorithms, Supply Chain Management, Transportation Tags , , ,

    The classic version of the Inventory Routing Problem considers a system with one supplier that manages the stock level of a set of customers. The supplier defines when and how much products to supply and how to combine customers in routes while minimizing storage and transportation costs. We present a new version of this problem … Read more

    Assessment of systemic vulnerabilities in container shipping networks with consideration of transhipment

  • Pablo E. Achurra-Gonzalez
  • Panagiotis Angeloudis
  • Nils Goldbeck
  • Daniel J. Graham
  • Marc Stettler
  • Konstantinos Zavitsas
    • Categories Game Theory, Supply Chain Management, Transportation

    The global container shipping network is vital to international trade. Current techniques for its vulnerability assessment are constrained due to the lack of historical disruption data and computational limitations due to typical network sizes. We address these modelling challenges by developing a new framework, composed by game-theoretic attacker-defender model and a cost-based container assignment model … Read more

    Coordination of a two-level supply chain with contracts

  • Safia Kedad-Sidhoum
  • Fanny Pascual
  • Siao-Leu Phouratsamay
    • Categories Dynamic Programming, Production and Logistics, Supply Chain Management Tags , , , ,

    We consider the coordination of planning decisions of a single product in a supply chain composed of one supplier and one retailer, by using contracts. We assume that the retailer has the market power: he can impose his optimal replenishment plan to the supplier. Our aim is to minimize the supplier’s cost without increasing the … Read more

    Acyclic Mechanism Design for Freight Consolidation

  • Maged M. Dessouky
  • Alejandro Toriello
  • Nelson A. Uhan
  • Wentao Zhang
    • Categories Game Theory, Supply Chain Management, Transportation Tags , ,

    Freight consolidation is a logistics practice that improves the cost-effectiveness and efficiency of transportation operations, and also reduces energy consumption and carbon footprint. A “fair” shipping cost sharing scheme is indispensable to help establish and sustain the cooperation of a group of suppliers in freight consolidation. In this paper, we design a truthful acyclic mechanism … Read more

    Global Optimisation of Multi-Plant Manganese Alloy Production

  • Henrik Andersson
  • Stein Wasbø
  • Martin Digernes
  • Brage Rugstad Knudsen
  • Lars Rudi
  • Magnus Stålhane
    • Categories Global Optimization Applications, Production and Logistics, Supply Chain Management

    This paper studies the problem of multi-plant manganese alloy production. The problem consists of finding the optimal furnace feed of ores, fluxes, coke, and slag that yields output products which meet customer specifications, and to optimally decide the volume, composition, and allocation of the slag. To solve the problem, a nonlinear pooling problem formulation is … Read more