Anders N. Gullhav
About
I am the study programme director for the Industrial Economics and Technology Management programme at NTNU.
Research and dissemination
My research area is operations research applied to health services. I develop optimisation and simulation models that give managers and planners a better basis for allocating scarce resources — staff, operating rooms, beds and time — with emphasis on the tactical level and on integrated planning across units and levels of care. The work is carried out in close collaboration with health care organizations, such as St. Olavs hospital, Trondheim municipality, Oslo University Hospital and Vestre Viken, and companies. I disseminate both in academic settings and directly to managers and analysts in the health services, through talks and workshops.
Teaching and supervision
My teaching spans the range from introductory operations research to independent research work, covering modelling and decision support for techno-economic planning, advanced optimisation models and solution methods, and continuing education for managers on how digital technologies are changing decision-making. I have supervised five doctoral candidates — three as main supervisor — and more than 25 master's theses involving over 50 students since 2011. The emphasis is on applications in health services, using real data and real problems in collaboration with hospitals, municipalities, SINTEF and industrial companies. Several theses have led on to publications and doctoral projects.
Research
My research area is operations research applied to health services. I develop mathematical models and methods, mainly optimisation and simulation, that give managers and planners in health and care services a better basis for allocating scarce resources: staff, operating rooms, beds, equipment and time.
My doctoral work (2016) concerned optimisation-based resource allocation in cloud computing. The methodological foundation from that work — integer programming, Dantzig–Wolfe decomposition and metaheuristics — is what I have since brought into the health sector, where the planning problems are at least as complex, and where the consequences of poor planning are felt directly by patients and staff alike.
My work spans the strategic, tactical and operational levels, but the centre of gravity is the tactical: decisions on capacity and resource allocation over weeks and months, linking long-term goals to day-to-day operations. This level is under-researched in health services, and at the same time it is where much of the potential for improvement lies.
Key application areas have included surgery scheduling and the integrated planning of operating rooms and outpatient clinics, schedules for patient pathways made up of several linked appointments, rostering and staff scheduling for nurses and surgeons, patient flow in emergency departments, home care services, and waiting times in child and adolescent mental health services. A recurring feature of this work is that the models are developed in close dialogue with those who are to use them, and that they account for uncertainty, dependencies between units and the working conditions of staff — not efficiency alone.
Supervision
I am the main supervisor of Sara Bigharaz, who works on tactical schedules for patient pathways consisting of several linked appointments, with integrated use of resources in the outpatient clinic and the operating room, and of Brede Sørøy, who develops decomposition methods and metaheuristics for integrated project and personnel scheduling. I was the main supervisor of Thomas R. Bovim (PhD 2023), whose work addressed stochastic surgery scheduling under downstream resource constraints, integrated surgery and outpatient clinic scheduling, and simulation of patient flow in emergency departments.
As co-supervisor I have worked with Kjartan K. Klyve (PhD 2021), whose research concerned rostering and staff scheduling in hospitals, including semi-cyclic rosters for surgeons and proactive versus reactive strategies in a neonatal intensive care unit, and with Amia Enam (PhD 2023), who studied the digitalisation of health services and how the introduction of new technology affects operations and working practices.
Collaboration and appointments
I place great emphasis on research that has an impact in practice — for patients and for staff. My projects are therefore carried out in close collaboration with health service organisations, such as St. Olavs hospital, Trondheim municipality, Oslo University Hospital and Vestre Viken Hospital Trust, and I hold an adjunct position as adviser at the Centre for Service Innovation (Tjenesteinnovasjonssenteret) at St. Olavs hospital.
Internationally, I serve on the board of ORAHS (EURO Working Group on Operational Research Applied to Health Services), and hosted the ORAHS conference in Trondheim in 2025. I am a guest editor for the journal Health Systems.
Dissemination
Dissemination is an integral part of my research and is directed at two audiences. One is academic: international conferences such as ORAHS and EURO, and publication in journals within operations research and health service planning.
The other — and to me equally important — audience is the managers, planners and analysts working in health services themselves. Models create no value until someone puts them to use, and that requires those running the services to understand what the methods can and cannot answer. I therefore give talks regularly in hospitals and municipalities aimed at a general professional audience, for instance on how simulation can be used to understand patient flow, coordination and staffing needs, and I take part in coordination and professional forums where results are discussed directly with those who will use them.
Workshops bringing researchers and practitioners together are a key format. At the ORAHS conference in Trondheim in 2025 we organised a dedicated Practitioner's Day, where managers and analysts from the Norwegian health services met the international research community. Such meeting points work in both directions: practice gains access to methods and experience from other countries, and research gains a reality check that makes the models more relevant.
HARMONI
Digital tvilling for kapasitetsstyring
Publications
A recurring theme across my publications is integrated — system-wide — planning: resources and patient flows must be planned across units and services rather than in isolation, because decisions in one place propagate through the system.
Planning of diagnostic, surgical and outpatient activity in hospitals. Work on block scheduling at MRI labs, stochastic master surgery scheduling under downstream resource constraints, integrated operating room and outpatient clinic scheduling, a framework for integrated resource planning in surgical clinics, tactical schedules for patient pathways involving several linked appointments, and reduced waiting times in child and adolescent mental health services through a revised appointment policy.
Rostering and staff scheduling. Semi-cyclic rosters for surgeons balancing stability and flexibility, evaluation of proactive versus reactive nurse rostering strategies in neonatal intensive care, and experiences from applying new technology to hospital rostering.
Coordination and patient flow across levels of care. Simulation of emergency department patient flow during the COVID-19 pandemic, home care capacity configuration under demographic change, and modelling frameworks for integrated and hybrid care pathways spanning hospital and municipal services.
2026
-
Viana, Joe;
Gullhav, Anders Nordby;
Dreyer, Heidi Carin;
Hagen, Alexander L.;
Holmemo, Marte Daae-Qvale;
Obstfelder, Aud Uhlen;
Rostad, Hanne Marie;
Døhl, Øystein.
(2026)
Hybrid Integrated Care Modeling Framework to Improve Patient Outcomes and System Performance.
Academic chapter
2025
-
Bigharaz, Sara;
Andersson, Henrik;
Gullhav, Anders N..
(2025)
A rolling horizon-based matheuristic for the Integrated Multi-Appointment Blueprint Scheduling Problem.
Computers & industrial engineering
Academic article
-
Bigharaz, Sara;
Andersson, Carl Henrik;
Gullhav, Anders Nordby;
Bovim, Thomas Reiten.
(2025)
Integrated resource scheduling for patient appointment series — Designing tactical blueprints for an orthopedic clinic.
Operations Research, Data Analytics and Logistics (ORDAL)
Academic article
-
Jong, Aline de;
Waegeningh, Rimmert van der Kooij-van;
Gullhav, Anders Nordby;
Boucherie, Richard J..
(2025)
Optimal home healthcare centre configurations under demographic changes in Andøy commune.
Journal of the Operational Research Society
Academic article
2024
-
Klyve, Kjartan Kastet;
Løyning, Isabel Nordli;
Melby, Line Maria Haugen;
Andersson, Carl Henrik;
Gullhav, Anders Nordby.
(2024)
A modeling framework for evaluating proactive and reactive nurse rostering strategies — A case study from a Neonatal Intensive Care Unit.
Operations Research for Health Care
Academic article
-
Bovim, Thomas Reiten;
Gullhav, Anders Nordby;
Andersson, Henrik;
Riise, Atle.
(2024)
A framework for integrated resource planning in surgical clinics.
European Journal of Operational Research
Academic article
2023
-
Andersson, Carl Henrik;
Høyland, Sondre;
Krogstad, Jesper Anker;
Flatberg, Truls;
Gullhav, Anders Nordby.
(2023)
The Snow Grooming Routing Problem.
Lecture Notes in Computer Science (LNCS)
Academic article
-
Barth, Maren Schliekelmann;
Palm, Katharina;
Andersson, Carl Henrik;
Granberg, Tobias Andersson;
Gullhav, Anders Nordby;
Krüger, Andreas Jørstad.
(2023)
Emergency exit layout planning using optimization and agent-based simulation.
Computational Management Science
Academic article
2022
-
Bovim, Thomas;
Abdullahu, Anita;
Andersson, Henrik;
Gullhav, Anders Nordby.
(2022)
Integrated master surgery and outpatient clinic scheduling.
Operations Research for Health Care
Academic article
-
Gullhav, Anders Nordby;
Skomsvoll, Johan Fredrik;
Heimstad, Runa Kristine;
Schultz, Joseph Samuel.
(2022)
Reducing waiting times from 65 to under 40 days for children and adolescents receiving mental health services using a new scheduling policy.
Health Services Management Research
Academic article
2021
-
Bovim, Thomas;
Gullhav, Anders Nordby;
Andersson, Henrik;
Dale, Jostein;
Karlsen, Kjetil Andreas Hognestad.
(2021)
Simulating emergency patient flow during the COVID-19 pandemic.
Journal of Simulation (JOS)
Academic article
-
Barth, Maren Schliekelmann;
Palm, Katharina;
Gullhav, Anders Nordby;
Andersson, Henrik;
Krüger, Andreas;
Granberg, Tobias.
(2021)
Emergency Exit Planning using Agent-Based Simulation and Optimization.
Norges teknisk-naturvitenskapelige universitet
Master thesis
-
Klyve, Kjartan Kastet;
Andersson, Henrik;
Gullhav, Anders Nordby;
Endreseth, Birger Henning.
(2021)
Semi-cyclic rostering of ranked surgeons — A real-life case with stability and flexibility measures.
Operations Research for Health Care
Academic article
-
Klyve, Kjartan Kastet;
Gullhav, Anders Nordby.
(2021)
Fremtidens turnusplanlegging ved sykehus - erfaringer ved bruk av ny teknologi.
Academic chapter
2020
-
Turkeš, Renata;
Sörensen, Kenneth;
Hvattum, Lars Magnus;
Barrena, Eva;
Chentli, Hayet;
Coelho, Leandro C;
Dayarian, Iman;
Grimault, Axel;
Gullhav, Anders Nordby;
Iris, Cagatay.
(2020)
Data for a meta-analysis of the adaptive layer in adaptive large neighborhood search.
Data in Brief
Academic article
-
Bovim, Thomas;
Christiansen, Marielle;
Gullhav, Anders Nordby;
Range, Troels Martin;
Hellemo, Lars.
(2020)
Stochastic master surgery scheduling.
European Journal of Operational Research
Academic article
-
Gullhav, Anders Nordby.
(2020)
Undervisning av matematisk modellering i operasjonsanalyse – innføring av studentsentrerte modelleringsøkter i forelesningene.
Læring om læring
Academic article
2018
-
Gullhav, Anders N.;
Christiansen, Marielle;
Nygreen, Bjørn;
Aarlott, Mats Mathisen;
Medhus, Jon Erik;
Skomsvoll, Johan Fredrik;
Østbyhaug, Per Olav.
(2018)
Block scheduling at magnetic resonance imaging labs.
Operations Research for Health Care
Academic article
2017
-
Gullhav, Anders Nordby;
Cordeau, Jean-Francois;
Hvattum, Lars Magnus;
Nygreen, Bjørn.
(2017)
Adaptive large neighborhood search heuristics for multi-tier service deployment problems in clouds.
European Journal of Operational Research
Academic article
-
Gullhav, Anders Nordby;
Nygreen, Bjørn;
Heegaard, Poul Einar.
(2017)
Simulation of the response time distribution of fault-tolerant multi-tier cloud services.
Journal of Simulation (JOS)
Academic article
2016
-
Gullhav, Anders Nordby;
Nygreen, Bjørn.
(2016)
A branch and price approach for deployment of multi-tier software services in clouds.
Computers & Operations Research
Academic article
-
Gullhav, Anders N.;
Nygreen, Bjørn;
Heegaard, Poul Einar;
Hvattum, Lars Magnus.
(2016)
Optimization-based Resource Allocation in Cloud Computing.
Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
2015
-
Gullhav, Anders N.;
Nygreen, Bjørn.
(2015)
Deployment of replicated multi-tier services in cloud data centres.
International Journal of Cloud Computing
Academic article
2013
-
Gullhav, Anders N.;
Nygreen, Bjørn;
Heegaard, Poul Einar.
(2013)
Approximating the Response Time Distribution of Fault-tolerant Multi-tier Cloud Services.
Academic chapter
Journal publications
-
Bigharaz, Sara;
Andersson, Henrik;
Gullhav, Anders N..
(2025)
A rolling horizon-based matheuristic for the Integrated Multi-Appointment Blueprint Scheduling Problem.
Computers & industrial engineering
Academic article
-
Bigharaz, Sara;
Andersson, Carl Henrik;
Gullhav, Anders Nordby;
Bovim, Thomas Reiten.
(2025)
Integrated resource scheduling for patient appointment series — Designing tactical blueprints for an orthopedic clinic.
Operations Research, Data Analytics and Logistics (ORDAL)
Academic article
-
Jong, Aline de;
Waegeningh, Rimmert van der Kooij-van;
Gullhav, Anders Nordby;
Boucherie, Richard J..
(2025)
Optimal home healthcare centre configurations under demographic changes in Andøy commune.
Journal of the Operational Research Society
Academic article
-
Turkeš, Renata;
Sörensen, Kenneth;
Hvattum, Lars Magnus;
Barrena, Eva;
Chentli, Hayet;
Coelho, Leandro C;
Dayarian, Iman;
Grimault, Axel;
Gullhav, Anders Nordby;
Iris, Cagatay.
(2020)
Data for a meta-analysis of the adaptive layer in adaptive large neighborhood search.
Data in Brief
Academic article
-
Gullhav, Anders Nordby;
Nygreen, Bjørn.
(2016)
A branch and price approach for deployment of multi-tier software services in clouds.
Computers & Operations Research
Academic article
-
Bovim, Thomas;
Christiansen, Marielle;
Gullhav, Anders Nordby;
Range, Troels Martin;
Hellemo, Lars.
(2020)
Stochastic master surgery scheduling.
European Journal of Operational Research
Academic article
-
Gullhav, Anders N.;
Nygreen, Bjørn.
(2015)
Deployment of replicated multi-tier services in cloud data centres.
International Journal of Cloud Computing
Academic article
-
Klyve, Kjartan Kastet;
Løyning, Isabel Nordli;
Melby, Line Maria Haugen;
Andersson, Carl Henrik;
Gullhav, Anders Nordby.
(2024)
A modeling framework for evaluating proactive and reactive nurse rostering strategies — A case study from a Neonatal Intensive Care Unit.
Operations Research for Health Care
Academic article
-
Andersson, Carl Henrik;
Høyland, Sondre;
Krogstad, Jesper Anker;
Flatberg, Truls;
Gullhav, Anders Nordby.
(2023)
The Snow Grooming Routing Problem.
Lecture Notes in Computer Science (LNCS)
Academic article
-
Barth, Maren Schliekelmann;
Palm, Katharina;
Andersson, Carl Henrik;
Granberg, Tobias Andersson;
Gullhav, Anders Nordby;
Krüger, Andreas Jørstad.
(2023)
Emergency exit layout planning using optimization and agent-based simulation.
Computational Management Science
Academic article
-
Bovim, Thomas;
Gullhav, Anders Nordby;
Andersson, Henrik;
Dale, Jostein;
Karlsen, Kjetil Andreas Hognestad.
(2021)
Simulating emergency patient flow during the COVID-19 pandemic.
Journal of Simulation (JOS)
Academic article
-
Gullhav, Anders Nordby;
Cordeau, Jean-Francois;
Hvattum, Lars Magnus;
Nygreen, Bjørn.
(2017)
Adaptive large neighborhood search heuristics for multi-tier service deployment problems in clouds.
European Journal of Operational Research
Academic article
-
Gullhav, Anders Nordby;
Nygreen, Bjørn;
Heegaard, Poul Einar.
(2017)
Simulation of the response time distribution of fault-tolerant multi-tier cloud services.
Journal of Simulation (JOS)
Academic article
-
Bovim, Thomas;
Abdullahu, Anita;
Andersson, Henrik;
Gullhav, Anders Nordby.
(2022)
Integrated master surgery and outpatient clinic scheduling.
Operations Research for Health Care
Academic article
-
Klyve, Kjartan Kastet;
Andersson, Henrik;
Gullhav, Anders Nordby;
Endreseth, Birger Henning.
(2021)
Semi-cyclic rostering of ranked surgeons — A real-life case with stability and flexibility measures.
Operations Research for Health Care
Academic article
-
Gullhav, Anders N.;
Christiansen, Marielle;
Nygreen, Bjørn;
Aarlott, Mats Mathisen;
Medhus, Jon Erik;
Skomsvoll, Johan Fredrik;
Østbyhaug, Per Olav.
(2018)
Block scheduling at magnetic resonance imaging labs.
Operations Research for Health Care
Academic article
-
Gullhav, Anders Nordby;
Skomsvoll, Johan Fredrik;
Heimstad, Runa Kristine;
Schultz, Joseph Samuel.
(2022)
Reducing waiting times from 65 to under 40 days for children and adolescents receiving mental health services using a new scheduling policy.
Health Services Management Research
Academic article
-
Gullhav, Anders Nordby.
(2020)
Undervisning av matematisk modellering i operasjonsanalyse – innføring av studentsentrerte modelleringsøkter i forelesningene.
Læring om læring
Academic article
-
Bovim, Thomas Reiten;
Gullhav, Anders Nordby;
Andersson, Henrik;
Riise, Atle.
(2024)
A framework for integrated resource planning in surgical clinics.
European Journal of Operational Research
Academic article
Part of book/report
-
Viana, Joe;
Gullhav, Anders Nordby;
Dreyer, Heidi Carin;
Hagen, Alexander L.;
Holmemo, Marte Daae-Qvale;
Obstfelder, Aud Uhlen;
Rostad, Hanne Marie;
Døhl, Øystein.
(2026)
Hybrid Integrated Care Modeling Framework to Improve Patient Outcomes and System Performance.
Academic chapter
-
Klyve, Kjartan Kastet;
Gullhav, Anders Nordby.
(2021)
Fremtidens turnusplanlegging ved sykehus - erfaringer ved bruk av ny teknologi.
Academic chapter
-
Gullhav, Anders N.;
Nygreen, Bjørn;
Heegaard, Poul Einar.
(2013)
Approximating the Response Time Distribution of Fault-tolerant Multi-tier Cloud Services.
Academic chapter
Student thesis or dissertation
-
Barth, Maren Schliekelmann;
Palm, Katharina;
Gullhav, Anders Nordby;
Andersson, Henrik;
Krüger, Andreas;
Granberg, Tobias.
(2021)
Emergency Exit Planning using Agent-Based Simulation and Optimization.
Norges teknisk-naturvitenskapelige universitet
Master thesis
-
Gullhav, Anders N.;
Nygreen, Bjørn;
Heegaard, Poul Einar;
Hvattum, Lars Magnus.
(2016)
Optimization-based Resource Allocation in Cloud Computing.
Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
Teaching
Courses
- IØ6555 - Digital transformation and decision support for managers
- TIØ4505 - Managerial Economics and Operations Research, Specialization Course
- TIØ4905 - Managerial Economics and Operations Research, Master's Thesis
- TIØ4130 - Optimization Methods with Applications
- TIØ4126 - Optimization and Decision Support for Industrial Business Planning
- TIØ4500 - Managerial Economics and Operations Research, Specialization Project
My teaching spans the range from introductory operations research to independent research work. At the introductory level I teach modelling and decision support for techno-economic planning, including linear and integer programming as well as queueing theory and simulation. At the advanced level I go further into advanced optimisation models and solution methods, and into the interplay between model formulation and choice of method. I also teach managers and advisers in continuing education about how digital technologies are changing decision-making in organisations. Within the specialisation in Applied Economics and Optimisation in the Industrial Economics and Technology Management programme, I supervise project and master's theses on real problems, often drawn from the health services.
Supervision
I have supervised five doctoral candidates — three as main supervisor and two as co-supervisor — and 22 master's theses involving a total of 45 students since 2014. The emphasis is on applications in health services: surgery scheduling, rostering and staff scheduling, MRI and outpatient clinic planning, emergency department and hospital layout, advanced home hospital care, and simulation of care pathways for frail elderly patients. Integrated planning across resources and units is a recurring theme. I also supervise projects in other sectors, including routing, production scheduling and inventory management, where the methods are the same. The work is usually carried out with hospitals, municipalities, SINTEF and companies, using real data and real problems. Several theses have led to scientific publications, and some to doctoral projects.
Outreach
2026
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Other presentationGullhav, Anders Nordby; Viana, Joe. (2026) HARMONI-prosjektet: Simulering av pasientstrømmer mellom St. Olavs hospital og Trondheim kommune. Workshop om styrket samhandling i akuttsløyfen
2025
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Conference lectureViana, Joe; Gullhav, Anders Nordby. (2025) Datasimulering som nøkkel til bedre samhandling og pasientflyt – HARMONI-prosjektet. St Olavs Konferanse
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LectureViana, Joe; Gullhav, Anders Nordby. (2025) HARMONI – status og videre arbeid, Koordineringsmøte samhandling. Koordineringsmøte samhandling
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Conference lectureViana, Joe; Gullhav, Anders Nordby; Dreyer, Heidi Carin; Holmemo, Marte Daae-Qvale; Obstfelder, Aud Uhlen; Rostad, Hanne Marie; Døhl, Øystein. (2025) Integrated care modelling utilising a shared patient information system. ORAHS 2025 (EURO Working Group on Operational Research Applied to Health Services)
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LectureViana, Joe; Gullhav, Anders Nordby. (2025) Datasimulering som nøkkel til bedre samhandling og pasientflyt – HARMONI-prosjektet. Trondheim kommune økonomitjenesten
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Conference lectureViana, Joe; Gullhav, Anders Nordby; Lind-Hagen, Alexaner. (2025) Improving Elderly Patient Flow through Simulation: A Case Study from Trondheim’s Integrated Care System. Helsetjenesteforskningskonferansen 2025
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Conference lectureViana, Joe; Gullhav, Anders Nordby; Lind-Hagen, Alexander. (2025) Discrete Event Simulation in Healthcare: Enhancing Coordination for Frail Elderly Patients in Trondheim. NORS – The Norwegian Operations Research Society (NORS 2025)
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LectureGullhav, Anders Nordby; Viana, Joe. (2025) HARMONI. Klinisk for forskningsstøtte og forskningsdata i Midt-Norge
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LectureViana, Joe; Gullhav, Anders Nordby. (2025) Datasimulering - pasientforløp, bemanning og ressurskapasitet. Nasjonalt webinar 26. november for simulering i medisin og helsefag
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LectureViana, Joe; Gullhav, Anders Nordby. (2025) HARMONI – Helseplattformen. Helseplattformen and HARMONI project meeting
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Conference lectureViana, Joe; Gullhav, Anders Nordby; Dreyer, Heidi Carin; Hagen, Alexander Lind; Holmemo, Marte Daae-Qvale; Obstfelder, Aud Uhlen; Rostad, Hanne Marie; Døhl, Øystein. (2025) Hybrid Integrated Care Modeling Framework to Improve Patient Outcomes and System Performance. Winter Simulation Conference
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Other presentation
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LectureViana, Joe; Gullhav, Anders Nordby. (2025) Hvordan kan datasimuleringer bidra til bedre samhandling mellom helsetjenestene?. Fredagsforelesningene på St. Olavs hospital
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Conference lectureSjo, Espen; Bovim, Thomas Reiten; Gullhav, Anders Nordby. (2025) Obtaining Efficient and Fair Rosters – Approximating the Pareto Front of a Multi-Objective Non-Linear Nurse Rostering Problem using a Hybrid Memetic Algorithm. NORS Annual Conference 2025
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2025) The dynamic integrated project and personnel scheduling problem. ICCL & EUROMar 2025
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2025) Several Dantzig-Wolfe reformulations for solving an integrated project and personnel scheduling problem. EURO 2025
2024
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Conference lectureGullhav, Anders Nordby; Lahrichi, Nadia; Rousseau, Louis-Martin. (2024) Integrated shift and appointment template scheduling for a chemotherapy clinic. Annual Meeting of the EURO Working Group on Operational Research Applied to Health Services (ORAHS) 2024
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Conference lectureGullhav, Anders Nordby; Lahrichi, Nadia; Rousseau, Louis-Martin. (2024) Tactical shift and appointment scheduling for a chemotherapy clinic. NORS annual conference 2024
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Conference lectureSørøy, Brede; Buan, Benjamin Sølvberg; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2024) An integrated project and personnel scheduling problem using an adaptive large neighbourhood search procedure. PMS 2024
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2024) Solving an integrated project and personnel scheduling problem using Dantzig–Wolfe decomposition. EURO 2024
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Conference lectureViana, Joe; Gullhav, Anders Nordby; Obstfelder, Aud Uhlen; Dreyer, Heidi Carin; Holmemo, Marte Daae-Qvale; Døhl, Øystein. (2024) Simulation Modelling for Integrated Health Care Planning. Norwegian Operations Research Society Annual Conference
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2024) A Dantzig–Wolfe decomposition approach for solving an integrated project and personnel scheduling problem. OR 2024
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2024) A Dantzig–Wolfe decomposition-based procedure to solve an integrated project and personnel scheduling problem. Annual conference of the Norwegian Operations Research Society
2023
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Conference lectureGullhav, Anders Nordby; Schiøtz, Mats I.; Tysse, Jostein H.; Hellemo, Lars. (2023) Advance Surgery Scheduling with downstream constraints and cancellations. Annual Meeting of the EURO Working Group on Operational Research Applied to Health Services (ORAHS)
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Conference lectureBigharaz, Sara; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2023) A tactical multi-appointment scheduling problem with the integrated resources in outpatient clinic and operating room. 49th Annual Meeting of the EURO Working Group on Operational Research Applied to Health Services
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Conference lectureSørøy, Brede; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2023) A Dantzig–Wolfe decomposition approach to solve an integrated project and personnel scheduling problem. 2023 INFORMS Annual Meeting
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Conference lectureSørøy, Brede; Buan, Benjamin Sølvberg; Gullhav, Anders Nordby. (2023) An adaptive large neighbourhood search procedure for solving an integrated project and personnel scheduling problem. OR 2023
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Conference lectureGullhav, Anders Nordby; Andersson, Carl Henrik; Riise, Atle. (2023) Master and activity scheduling in surgical departments - Managing waiting lists across units ans specialties. Operational Research Applied To Health Services
2022
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Conference lectureBigharaz, Sara; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2022) A blueprint schedule for surgeons considering the integration of outpatient clinic and operating room scheduling. Annual Conference of the Norwegian Operations Research Society
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Conference lectureBigharaz, Sara; Andersson, Carl Henrik; Gullhav, Anders Nordby. (2022) Designing a surgeon’s blueprint schedule for resource allocation to patient appointment series. 48th Annual Meeting of the EURO Working Group on Operational Research Applied to Health Services
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Conference lectureSørøy, Brede; Buan, Benjamin Sølvberg; Gullhav, Anders Nordby. (2022) An Integrated Project and Personnel Scheduling Problem. EURO 2022
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Conference lectureSørøy, Brede; Gullhav, Anders Nordby. (2022) Benefits of Solving the Project and Personnel Scheduling Problems Simultaneously. Annual conference of the Norwegian Operations Research Society
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Conference lectureLangfeldt, Sigurd Sigurdsson; Langholm, Magnus Hauge; Spangelo, Tomas Haugland; Andersson, Henrik; Gullhav, Anders Nordby. (2022) Neural Network Assisted Large Neighborhood Search for Personnel Rostering. Annual conference of the Norwegian Operations Research Society
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Conference lectureGullhav, Anders Nordby; Langfeldt, Sigurd Sigurdsson; Langholm, Magnus Hauge; Spangelo, Tomas Haugland; Andersson, Henrik. (2022) Integrating Machine Learning in Metaheuristics - an example using a Neural Network Assisted Large Neighborhood Search for Personnel Rostering. COMPAMA Workshop - Learning for optimization
2021
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Conference lectureSørøy, Brede; Buan, Benjamin Sølvberg; Gullhav, Anders Nordby. (2021) Integrated Project and Personnel Scheduling using Optimisation and Metaheuristic Methods – With Applications in the Construction Industry. Annual conference of the Norwegian Operations Research Society
2020
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Conference lectureGullhav, Anders Nordby; Hellemo, Lars. (2020) Combined outpatient and master surgery scheduling. e-ORAHS
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Feature articleBovim, Thomas; Gullhav, Anders Nordby; Hellemo, Lars; Jessen, Vigleik; Mittet, Trude. (2020) Fleksibel planlegging i sykehus er effektivt.
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LectureGullhav, Anders Nordby. (2020) Planlegging og styring i sykehus. Ledersamling, Psykisk Helsevern Sykehuset Innlandet
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Conference lectureGullhav, Anders Nordby; Berdal, Tore B.; Nydal, Erlend M.; Andersson, Henrik; Nygreen, Bjørn. (2020) Emergency Department Layout Planning Using Simulation and Optimization. ORAHS 2020
2019
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LectureGullhav, Anders Nordby; Rønneberg, Martine Helene; Ingrid, Ødegård; Andersson, Henrik; Nygreen, Bjørn. (2019) Multi-Appointment Scheduling at a Psychiatric Outpatient Clinic. ORAHS 2019
2018
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Conference lectureGullhav, Anders Nordby; Bovim, Thomas Reiten; Christiansen, Marielle; Hellemo, Lars; Range, Troels Martin. (2018) Master surgery scheduling under uncertainty: a stochastic modelling approach for dimensioning and allocating flexible capacity under a hybrid policy. ORAHS
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Conference lectureGullhav, Anders Nordby; Kvillum, Vilde N.; Vigerust, Anne Marit R.; Andersson, Henrik; Nygreen, Bjørn. (2018) A Matheuristic Approach to the Hospital Facility Layout Problem. International Symposium on Mathematical Programming
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LectureGullhav, Anders Nordby; Christiansen, Marielle. (2018) Helselogistikk og pasientflyt – optimeringsbasert beslutningsstøtte ved St. Olavs hospital. Fredagsforelesning ved St. Olavs hospital
2017
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.; Christiansen, Marielle; Eilertsen, Anders Rogne; Selvaag, Hanna M.. (2017) Appointment Scheduling of MRI examinations. IFORS 2017
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Conference lectureGullhav, Anders N.; Christiansen, Marielle; Eilertsen, Anders Rogne; Nygreen, Bjørn; Selvaag, Hanna M.. (2017) Optimizing the Appointment Scheduling at MRI labs. Informs annual meeting 2017
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Conference lectureGullhav, Anders N.; Christiansen, Marielle; Eilertsen, Anders Rogne; Nygreen, Bjørn; Selvaag, Hanna M.. (2017) Decision Support for Appointment Scheduling of MRI Examinations. ORAHS 2017
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Conference lectureGullhav, Anders N.; Christiansen, Marielle; Eilertsen, Anders Rogne; Nygreen, Bjørn; Selvaag, Hanna M.. (2017) Appointment Scheduling at the MRI labs of a Norwegian hospital. Informs Healthcare
2016
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Conference lectureNygreen, Bjørn; Gullhav, Anders Nordby; Christiansen, Marielle. (2016) MRI Block Scheduling at a Norwegian Hospital. Gjesteforelesning
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Conference lectureNygreen, Bjørn; Gullhav, Anders Nordby. (2016) A Branch and Price Approach for Deployment of Multi-tier Software Services in Clouds. 2016 INFORMS Annual Meeting
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LectureGullhav, Anders Nordby; Nygreen, Bjørn. (2016) A Branch and Price Approach for Deployment of Cloud Services. Column Generation 2016
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LectureGullhav, Anders Nordby; Christiansen, Marielle; Nygreen, Bjørn; Aarlott, Mats Mathisen; Medhus, Jon Erik. (2016) MRI Block Scheduling at a Norwegian Hospital. EURO 2016
2015
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2015) Deployment of Multi-tier Software Services in Clouds – a Branch-and-Price Approach. EURO 2015
2014
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.. (2014) A Branch-and-Price Approach for Deployment of Multi-tier Cloud Services. Annual Informs meeting 2014
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2014) A Column Generation Approach for Modelling Deployment of Multi-tier Cloud Services. IFORS 2014
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2014) Solving a Multi-tier Cloud Service Deployment Problem Using Branch-and-Price. Optimization Days 2014
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.. (2014) Service Deployment in Cloud Data Centres - Problem specification and solution methods. ERGO- Seminar
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.. (2014) A Branch-and-Price Approach for Energy-efficient Deployment of Multi-tier Services in Cloud Data Centres. APMOD (Applied Mathematical Optimization and Modelling)2014
2013
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2013) IP Column Generation for a Service Deployment Problem. Informs Annual Meeting 2013
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn; Heegaard, Poul Einar. (2013) Approximating the Response Time Distribution of Fault-tolerant Multi-tier Cloud Services. 2013 IEEE/ACM 6th International Conference on Utility and Cloud Computing (UCC)
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.. (2013) A Branch-and-Price Approach for a Cloud Service Deployment Problem. Nordic Optimisation Symphosium 6
2012
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2012) Deployment of Multi-tier Services in Cloud Data Centers confined by Quality of Service (QoS) Requirements. 5th Nordic Optimization Symposium
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Conference lectureNygreen, Bjørn; Gullhav, Anders N.. (2012) Deployment of Multi-tier ICT Services in Cloud Data Centres. OR54 (Annual British OR Conference)
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn. (2012) Service deployment in cloud data centers regarding quality of service requirements. International symposium on mathematical programming (ISMP)
2011
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Conference lectureGullhav, Anders N.; Nygreen, Bjørn; Heegaard, Poul Einar. (2011) Service Deployment Decisions in Cloud Data Centers Based on Service Level Agreements (SLA). Informas 2011 Annual Meeting