• A hybrid approach for solving real-world nurse rostering problems 

      Stølevik, Martin; Nordlander, Tomas; Frøyseth, Helle; Riise, Atle (Journal article; Peer reviewed, 2011)
      Nurse rostering is the process of creating a plan for nurse working hours over a given time horizon. This problem, most variants of which are NP-hard, has been studied extensively for many years. Still, practical nurse ...
    • A mathematical model for the nurse rostering system 

      Stølevik, Martin; Nordlander, Tomas; Riise, Atle (Research report, 2011)
      The model we present in this report is mainly developed on work done together with the company Gatsoft AS. With minor changes and extensions, a version of the model has been implemented and delivered to Gatsoft as a plug-in ...
    • Parallel Local search for the CVRP on the GPU 

      Schulz, Christian Ferdinand; Hasle, Geir; Kloster, Oddvar; Riise, Atle; Smedsrud, Morten (Lecture, 2010)
      For many applications of optimized transportation management, there is still a large gap between the requirements and the performance of today’s decision support systems. Vehicle routing is no exception. Although there has ...
    • The Surgery Scheduling Problem - A General Model 

      Riise, Atle; Mannino, Carlo (Research report, 2012)
      The term surgery scheduling is used about a variety of strategic, tactical and operational scheduling problems, many of which are critical to an efficient use of hospital resources. Our focus is on operational surgery ...