Blar i Publikasjoner fra CRIStin - NTNU på forfatter "Fagerholt, Kjetil"

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    • Maritime crude oil transportation – A split pickup and split delivery problem 

      Hennig, Frank; Nygreen, Bjørn; Christiansen, Marielle; Fagerholt, Kjetil; Furman, Kevin C; Song, Jinhwa; Kocis, Gary R; Warrick, Philip H (Journal article; Peer reviewed, 2012)
      The maritime oil tanker routing and scheduling problem is known to the literature since before 1950. In the presented problem, oil tankers transport crude oil from supply points to demand locations around the globe. The ...

    • Maritime fleet composition under future greenhouse gas emission restrictions and uncertain fuel prices 

      Loennechen, Olav; Fagerholt, Kjetil; Lagemann, Benjamin; Stålhane, Magnus (Peer reviewed; Journal article, 2024)
      This paper studies the maritime fleet composition problem with uncertain future fuel and carbon prices under the restriction of complying with future greenhouse gas (GHG) emission restrictions. We propose a two-stage ...

    • Maritime fleet deployment in ro-ro shipping under inventory constraints 

      Chandra, Saurabh; Fagerholt, Kjetil; Christiansen, Marielle (Journal article; Peer reviewed, 2015)
      We present a tactical maritime fleet deployment problem in roll-on roll-off (ro-ro) liner shipping scenario, which deals with optimally assigning planned voyages to the available vessels in a fleet to determine the routing ...

    • Maritime fleet deployment with speed optimization and voyage separation requirements 

      Borander, Venke; Straume, Anders; Dong, Bo; Fagerholt, Kjetil; Wang, Xin (Journal article; Peer reviewed, 2018)
      A shipping company operates a heterogeneous fleet of ships to service a given number of voyages on a number of trade routes over the planning horizon. Each ship has a predefined speed range within which it can sail. Fuel ...

    • Maritime inventory routing : recent trends and future directions 

      Fagerholt, Kjetil; Hvattum, Lars Magnus; Papageorgiou, Dimitri J.; Urrutia, Sebastián (Peer reviewed; Journal article, 2023)
      We review recent literature pertaining to the maritime inventory routing problem (MIRP), a stimulating, albeit niche, subclass of vendor-managed inventory problems. MIRPs deal with optimally distributing products with a ...

    • Maritime inventory routing with transshipment: the case of Yamal LNG 

      Li, Mingyu; Fagerholt, Kjetil; Schütz, Peter (Peer reviewed; Journal article, 2022)
      The LNG-ADP problem is a tactical planning problem for creating an annual delivery program (ADP) for a liquefied natural gas (LNG) producer. An ADP specifies the departure dates of the LNG carriers as well as the delivery ...

    • Maritime routing and speed optimization with emission control areas 

      Fagerholt, Kjetil; Gausel, Nora Therese; Rakke, Jørgen Glomvik; Psaraftis, Harilaos (Journal article; Peer reviewed, 2015)
      Strict limits on the maximum sulphur content in fuel used by ships have recently been imposed in some Emission Control Areas (ECAs). In order to comply with these regulations many ship operators will switch to more expensive ...

    • Maximizing the rate of return on the capital employed in shipping capacity renewal 

      Mørch, Ove; Fagerholt, Kjetil; Pantuso, Giovanni; Rakke, Jørgen Glomvik (Journal article; Peer reviewed, 2017)
      Decisions regarding investments in capacity expansion/renewal require taking into account both the operating fitness and the financial performance of the investment. While several operating requirements have been considered ...

    • A MIP-based heuristic for a single trade routing and scheduling problem in roll-on roll-off shipping 

      Hansen, Jone Reinlund; Fagerholt, Kjetil; Meisel, Frank (Journal article; Peer reviewed, 2022)
      We study a single trade ship routing and scheduling problem for a roll-on roll-off shipping company. Along the given trade, there is a number of contracts for transportation of cargoes between port pairs. Each contract ...

    • Modeling a Supply Chain for Carbon Capture and Offshore Storage - A German-Norwegian Case Study 

      Bennæs, Anders; Skogset, Martin; Svorkdal, Tormod; Fagerholt, Kjetil; Herlicka, Lisa; Meisel, Frank; Rickels, Wilfried (Peer reviewed; Journal article, 2023)
      Carbon capture and storage (CCS) for industrial emission point sources is one of the potential instruments to achieve net-zero carbon dioxide () goals. However, emission point sources and storage formations are often far ...

    • Network design with route planning for battery electric high-speed passenger vessel services 

      Havre, Håkon Furnes; Lien, Ulrik; Ness, Mattias Myklebust; Fagerholt, Kjetil; Rødseth, Kenneth Løvold (Peer reviewed; Journal article, 2023)
      This paper studies the Zero Emission passenger Vessel Service Network Design Problem (ZEVSNDP) in order to investigate how technical and economic challenges related to diffusion of battery electric vessels can be alleviated ...

    • Offshore supply planning in a rolling time horizon 

      Fernandez Cuesta, Eirik; Andersson, Henrik; Fagerholt, Kjetil (Journal article; Peer reviewed, 2018)
      This paper presents a real transportation problem stemming from offshore oil and gas logistics and shows how optimization models used in a rolling horizon simulation framework can be very valuable to assess and improve the ...

    • On two speed optimization problems for ships that sail in and out of emission control areas 

      Fagerholt, Kjetil; Psaraftis, Harilaos (Journal article; Peer reviewed, 2015)
      This paper deals with two speed optimization problems for ships that sail in and out of Emission Control Areas (ECAs) with strict limits on sulfur emissions. For ships crossing in and out of ECAs, such as deep-sea vessels, ...

    • Operational planning for routes and schedules for a fleet of fuel supply vessels 

      Christiansen, Marielle; Fagerholt, Kjetil; Rachaniotis, Nikos; Stålhane, Magnus (Journal article; Peer reviewed, 2017)
      This paper considers a real operational problem of routing and scheduling a fleet of fuel supply vessels used to service customer ships anchored outside a major port. The problem can be formulated as a rich multi-trip ...

    • Operational sea passage scenario generation for virtual testing of ships using an optimization for simulation approach 

      Sandvik, Endre; Nielsen, Jørgen Bremnes; Asbjørnslett, Bjørn Egil; Pedersen, Eilif; Fagerholt, Kjetil (Peer reviewed; Journal article, 2020)
      In this paper, a model for implementation of sea passage operational scenarios in the context of simulation-based design of ships is presented. To facilitate the transition towards more energy-efficient shipping, the ability ...

    • Optimal Charging and Repositioning of Electric Vehicles in a Free-Floating Carsharing System 

      Folkestad, Carl Axel Aadne; Hansen, Nora Åsheim; Fagerholt, Kjetil; Andersson, Henrik; Pantuso, Giovanni (Journal article; Peer reviewed, 2019)
      Carsharing has received increased attention from the Operations Research community in recent years. Currently, many systems are adopting electric vehicles that require charging when battery levels fall below a given level. ...

    • Optimal planning of an urban ferry service operated with zero emission technology 

      Rødseth, Kenneth Løvold; Fagerholt, Kjetil; Proost, Stef (Peer reviewed; Journal article, 2023)
      While passenger-only ferries can be an effective instrument in mitigating road congestion in urban areas, they are among the most polluting modes of transportation. This paper studies technical and economic feasibilities ...

    • Optimal ship lifetime fuel and power system selection 

      Lagemann, Benjamin; Lindstad, Elizabeth; Fagerholt, Kjetil; Rialland, Agathe Isabelle; Erikstad, Stein Ove (Journal article; Peer reviewed, 2021)

    • Optimisation of the broiler production supply chain 

      Brevik, Elisabeth; Lauen, Anna Ødegaard; Rolke, Maria Cathrine Berg; Fagerholt, Kjetil; Hansen, Jone Reinlund (Peer reviewed; Journal article, 2020)
      In this paper, we propose a mixed integer programming (MIP) model for the Chicken Flock Sizing, Allocation and Scheduling Problem (CFSASP), which is an important planning problem in the broiler production supply chain. To ...

    • Optimization in offshore supply vessel planning 

      Halvorsen-Weare, Elin Espeland; Fagerholt, Kjetil (Journal article; Peer reviewed, 2016)
      This paper considers the offshore supply vessel (OSV) planning problem, which consists of determining an optimal fleet size and mix of OSVs as well as their weekly routes and schedules for servicing offshore oil and gas ...