• A branch-and-cut embedded matheuristic for the inventory routing problem 

      Skålnes, Jørgen; Vadseth, Simen Tung; Andersson, Carl Henrik; Stålhane, Magnus (Peer reviewed; Journal article, 2023)
      This paper presents an improved version of the solution method that won the inventory routing problem track of the DIMACS Implementation Challenge. The solution method is a branch-and-cut embedded matheuristic where a ...
    • Controlling Risk in Maritime Fleet Renewal - A Stochastic Programming Approach 

      Skålnes, Jørgen (Master thesis, 2017)
      This thesis considers the Maritime Fleet Renewal Problem (MFRP) including the risk of insolvency. The MFRP is a strategic problem with a planning horizon of several years. The literature review shows that relatively little ...
    • An improved formulation for the inventory routing problem with time-varying demands 

      Skålnes, Jørgen; Andersson, Henrik; Desaulniers, Guy; Stålhane, Magnus (Journal article; Peer reviewed, 2022)
      The Inventory Routing Problem (IRP) is a broad class of complex routing problems where the quanti- ties of delivered products must also be determined. In this paper, we consider the classic IRP where a single supplier must ...
    • New benchmark instances for the inventory routing problem 

      Skålnes, Jørgen; Ben Ahmed, Mohamed; Hvattum, Lars Magnus; Stålhane, Magnus (Journal article; Peer reviewed, 2023)
      The existing sets of benchmark instances for the inventory routing problem (IRP) have been beneficial for investigating and illustrating the properties of the problem. However, they possess certain features and design ...
    • Risk Control in Maritime Shipping Investments 

      Skålnes, Jørgen; Fagerholt, Kjetil; Pantuso, Giovanni; Wang, Xin (Journal article; Peer reviewed, 2019)
      In this paper we extend the state-of-the-art stochastic programming models for the Maritime Fleet Renewal Problem (MFRP) to explicitly limit the risk of insolvency due to negative cash flows when making maritime shipping ...
    • Using Branch and Price to Optimize Land-Based Salmon Production 

      Føsund, Johan Moldeklev; Strandkleiv, Erlend Hjelle (Master thesis, 2021)
      Produksjon av laks på land er en spennende ny retning innen lakseoppdrett og kan ha operasjonelle synergieffekter med tradisjonelt sjøbasert lakseoppdrett. Å la smolt vokse seg større på land før de settes ut i sjøen er ...