Thierry GARAIX

Thierry GARAIX

Head of the I4S Department
Entity
Centre for Biomedical and Healthcare Engineering
Department
Healthcare Engineering (I4S)
Site
CSI, Saint-Priest-en-Jarez
Email
garaix@mines-stetienne.fr
Phone number
+33 4 77 42 66 41
Office
L214
    Biography

    Responsibilities and duties

    Courses: Production and logistics management
    CNRS Research group on operations research applied to health care sytems

    Skills

    Operations research
    Combinatorial optimization
    Computer science

    Biography

    Thierry Garaix is an Assistant Professor of Healthcare Management at the Center for Health Engineering of the École des Mines de Saint-Étienne
    (France), and member of the research laboratory LIMOS UMR CNRS 6158 (Clermont-Ferrand, France), since 2011. He received his Ph.D. in Operations Research and Geomatics from the Université d’Avignon et des Pays de Vaucluse (France), in 2007. His research interests focus on the optimization of logistics and production systems, in particular, on vehicle routing and scheduling problems. Many of them are in the health care context like home health care and emergency department planning.

    Research topics

    Research topics

    Health care management

    Teaching areas

    Teaching areas

    Logistics
    Operations research
    Programming (C, Java)

    Education

    Education

    Sep. 04 – July 08: PhD student and temporary assistant professor, Mathematical and Computer Sciences Engineering Center at University of Avignon.
    • Transportation optimization and vehicle routing problems. Supervisors : C. Artigues, D. Josselin, D. Feillet

    Publications

    Main publications

    • ”Staff dimensioning in homecare services with uncertain demands”, C. Rodriguez Verjan, O. EL-Rifai, T. Garaix, V. Augusto, X. Xie , International Journal of Production Research, 53(24):7396-7410 , 2015 .
    • ”Hybridization of Tabu Search with Feasible and Infeasible Local Searches for Periodic Home Health Care Logistics”, R. Liu, X. Xie, T. Garaix , Omega, 47:17-32 , 2014 .
    • ”A New Consistent Vehicle Routing Problem for the Transportation of People with Disabilities”, D. Feillet, T. Garaix, F. Lehuédé, O. Péton, D. Quadri , Networks, 63(3), 211-224 , 2014 .
    • ”Fast Minimum Float Computation In Activity Networks Under Interval Uncertainty”, T. Garaix, C. Artigues, C. Briand , Journal of Scheduling, 16(1):93-103 , 2013 .
    • ”Vehicle routing problems with alternative paths : an application to on-demand transportation”, T. Garaix, C. Artigues, D. Feillet, D. Josselin , European Journal of Operational Research, 204(1):62-75 , 2010 .

    HAL Open Access Publications

    66 documents

    Journal articles21 document

    • Marius Huguet, Canan Pehlivan, François Ballereau, Antoine Dodane-Loyenet, Franck Fontanili, et al.. Indoor positioning systems provide insight into emergency department systems enabling proposal of designs to improve workflow. Communications Medicine, 2025, 5 (1), pp.72. ⟨10.1038/s43856-025-00793-y⟩. ⟨hal-05007148⟩
    • Robert Picard, Vincent Augusto, Mathias Béjean, Antoine Bertrand, Dominique Joseph Bicout, et al.. Ambitions et principaux enseignements du colloque « Santé globale, décisions locales », organisé par la Filière Santé numérique. Gériatrie et Psychologie Neuropsychiatrie Du Vieillissement, 2025, 23 (2), pp.141-152. ⟨10.1684/pnv.2025.1236⟩. ⟨hal-05162335⟩
    • Thierry Garaix, Mohammed Skiredj. A note on “A unified solution framework for multi-attribute vehicle routing problems”. European Journal of Operational Research, 2024, 314 (3), pp.1215-1219. ⟨10.1016/j.ejor.2023.11.037⟩. ⟨hal-04420027⟩
    • T. Garaix, P. Lacomme, I. Peña-Arenas. A label-setting algorithm for the truck driver scheduling problem in accordance with European Community social legislation. Expert Systems with Applications, 2024, 242, pp.122787. ⟨10.1016/j.eswa.2023.122787⟩. ⟨hal-04420302⟩
    • Omar Rifki, Thierry Garaix. Online Large-Scale Taxi Assignment: Optimization and Learning. Findings, 2023, ⟨10.32866/001c.74765⟩. ⟨hal-04116309⟩
    • Roberto Bargetto, Thierry Garaix, Xiaolan Xie. A branch-and-price-and-cut algorithm for operating room scheduling under human resource constraints. Computers and Operations Research, 2023, 152, pp.106136. ⟨10.1016/j.cor.2022.106136⟩. ⟨hal-04609352⟩
    • Eric Bourreau, Thierry Garaix, Matthieu Gondran, Philippe Lacomme, Nikolay Tchernev. A constraint-programming based decomposition method for the Generalised Workforce Scheduling and Routing Problem (GWSRP). International Journal of Production Research, 2022, 60 (4), pp.1265-1283. ⟨10.1080/00207543.2020.1856436⟩. ⟨lirmm-03286971⟩
    • Afafe Zehrouni, Vincent Augusto, Thierry Garaix, Raksmey Phan, Xiaolan Xie, et al.. Hospital flood emergency management planning using Markov models and discrete-event simulation. Operations Research for Health Care, 2021, 30, pp.100310. ⟨10.1016/j.orhc.2021.100310⟩. ⟨hal-04311642⟩
    • Roberto Bargetto, Thierry Garaix, Xiaolan Xie. Dynamic Insertion of Emergency Surgeries With Different Waiting Time Targets. IEEE Transactions on Automation Science and Engineering, 2019, 16 (1), pp.87-99. ⟨hal-02024592⟩
    • Thierry Garaix, Salim Rostami, Xiaolan Xie. Daily outpatient chemotherapy appointment scheduling with random deferrals. Flexible Services and Manufacturing Journal, In press, ⟨10.1007/s10696-018-9326-x⟩. ⟨hal-02056838⟩
    • Omar El-Rifai, Thierry Georges Garaix, Xiaolan Xie. Proactive On-call Scheduling during a Seasonal Epidemic. Operations Research for Health Care, 2016, 8, pp.53 - 61. ⟨10.1016/j.orhc.2015.07.001⟩. ⟨hal-01903527⟩
    • Omar El-Rifai, Thierry Garaix, Vincent Augusto, Xiaolan Xie. A stochastic optimization model for shift scheduling in emergency departments. Health Care Management Science, 2015, 18 (3), pp.289-302. ⟨10.1007/s10729-014-9300-4⟩. ⟨hal-01245105⟩
    • Omar El-Rifai, Thierry Garaix, Vincent Augusto, Xiaolan Xie. A stochastic optimization model for shift scheduling in emergency departments. Health Care Management Science, 2015, 18 (3), pp.289 - 302. ⟨10.1007/s10729-014-9300-4⟩. ⟨hal-01905878⟩
    • Carlos Rodriguez, Thierry Garaix, X. Xie, Vincent Augusto. Staff dimensioning in homecare services with uncertain demands. International Journal of Production Research, 2015, 53 (24), pp.7396 - 7410. ⟨10.1080/00207543.2015.1081427⟩. ⟨hal-01906024⟩
    • Ran Liu, Xiaolan Xie, Thierry Garaix. Hybridization of tabu search with feasible and infeasible local searches for periodic home health care logistics. Alpha Omegan, 2014, 47, pp.17-32. ⟨10.1016/j.omega.2014.03.003⟩. ⟨emse-01109346⟩
    • Dominique Feillet, Thierry Garaix, Fabien Lehuédé, Olivier Péton, Dominique Quadri. A new consistent vehicle routing problem for the transportation of people with disabilities. Networks, 2014, 63 (3), pp.211-224. ⟨10.1002/net.21538⟩. ⟨hal-01904440⟩
    • Thierry Garaix, Christian Artigues, Cyril Briand. Fast minimum float computation in activity networks under interval uncertainty. Journal of Scheduling, 2013, 16 (1), pp.93-103. ⟨10.1007/s10951-012-0272-2⟩. ⟨hal-00564426⟩
    • F Della Croce, Thierry Garaix, A. Grosso. Iterated local search and very large neighborhoods for the parallel-machines total tardiness problem. Computers and Operations Research, 2012, 39 (6), pp.1213 - 1217. ⟨10.1016/j.cor.2010.10.017⟩. ⟨hal-01905786⟩
    • Thierry Garaix, Christian Artigues, Dominique Feillet, Didier Josselin. Optimization of occupancy rate in dial-a-ride problems via linear fractional column generation. Computers and Operations Research, 2011, 38 (10), pp.1435 - 1442. ⟨10.1016/j.cor.2010.12.014⟩. ⟨hal-01904436⟩
    • Thierry Garaix, Christian Artigues, Dominique Feillet, Didier Josselin. Vehicle routing problems with alternative paths: an application to on-demand transportation. European Journal of Operational Research, 2010, 204 (1), pp.62-75. ⟨10.1016/j.ejor.2009.10.002⟩. ⟨hal-00109003v3⟩
    • Thierry Garaix, Didier Josselin, Dominique Feillet, Christian Artigues, Elodie Castex. Transport à la demande points à points en zone peu dense. Proposition d'une méthode d'optimisation de tournées. Cybergeo : Revue européenne de géographie / European journal of geography, 2007, pp.article 396. ⟨hal-00176208⟩

    Conference papers37 document

    • Mahussi Hounkponou, Thierry Garaix, Raksmey Phan, Xiaolan Xie. ParcoursSenior : Estimating trail difficulty through modeling energy expenditure and fatigue evolution.. ROADEF 2026, Université de Tours, Feb 2026, Tours, France. ⟨hal-05534873⟩
    • Thierry Garaix, Yannick Kergosien, Louis Dublois. Optimizing Case-Mix Planning at the Territorial Level : A Pathway-Centered and Resource-Aware Approach. 51st annual meeting of the EURO Working Group on Operational Research Applied to Health Services, Jul 2025, Trondheim, France. ⟨hal-05399582⟩
    • Louis Dublois, Thierry Garaix, Yannick Kergosien. Optimisation du Mix de Parcours de Soins sur un Territoire. 26ème Congrès Annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, Feb 2025, Champs-sur-Marne, France. ⟨hal-04983130⟩
    • Omar Rifki, Garaix Thierry. Pilotage Dynamique de Transport Sanitaire: Apprentissage et Optimisation. GISEH (Gestion et Ingénierie des Systèmes Hospitaliers) 2022, Jun 2022, Saint-Etienne, France. ⟨hal-04116301⟩
    • Thierry Garaix, Philippe Lacomme, Iván Guillermo Peña Arenas, Nikolay Tchernev. A label Setting algorithm for the Truck Driver-Scheduling Problem under the European Community social legislation. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595215⟩
    • Camille Breen, Alexandre Benoist, Thierry Garaix, Stéphane Kirche, Xiaolan Xie. Organisation des capacités hospitalières en réanimation durant une période de crise épidémiologique. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595371⟩
    • Maxime Agius, Nabil Absi, Dominique Feillet, Thierry Garaix. A Branch-and-Price algorithm for a routing problem with inbound and outbound requests. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595206⟩
    • Omar Rifki, Thierry Garaix, Christine Solnon. Étude de la satisfiabilité du problème du voyageur de commerce avec fenêtres de temps. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595284⟩
    • Diana Abi-Nader, Nabil Absi, Dominique Feillet, Thierry Garaix, Cyriac Azefack, et al.. A Large Neighborhood Search approach for the Daily Drayage Problem with Time Windows. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595216⟩
    • Maxime Agius, Nabil Absi, Dominique Feillet, Thierry Garaix. Workload equity for a dynamic multi-period routing problem in the context of medical transportation. 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France. ⟨hal-03595454⟩
    • Philippe Lacomme, Eric Bourreau, Katyanne Farias, Thierry Garaix, Iván Peña-Arenas, et al.. On the Truck Driver Scheduling Problem: A Constraint Programming based approach. EURO 2021 - 31th European Conference on Operational Research, Jul 2021, Athens, Greece. ⟨hal-03390319⟩
    • Thierry Garaix, Philippe Lacomme, Iván Peña-Arenas, Nikolay Tchernev. Linear Formulation of the driver-scheduling problem under the European driving rules regulation.. 22éme Congrès annuel de la Société français de Recherche Opérationnelle et d’Aide à la Décision (ROADEF), Apr 2021, Mulhouse, France. ⟨hal-03726143⟩
    • Eric Bourreau, Katyanne Farias, Thierry Garaix, Philippe Lacomme, Diego Martino, et al.. First Constraint Programming based approach for the Truck Driver Scheduling Problem. ROADEF 2021 - 22e Congrès de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, Apr 2021, Mulhouse, France. ⟨hal-03381226⟩
    • Thierry Garaix, Xie Xiaolan, Guillaume Gardin, Claude Montuy-Coquard, Remi Bouvier. Stratégies d'admission en services de soins infirmiers à domicile. 10ème conférence Francophone en Gestion et Ingénierie des Systèmes Hospitaliers, GISEH2020, Oct 2020, Valenciennes, France. ⟨hal-03198093⟩
    • Eric Bourreau, Thierry Garaix, Matthieu Gondran, Philippe Lacomme, Nikolay Tchernev. Constraint Programming based Decomposition Method to the Generalised Workforce Scheduling and Routing Problem. ROADEF 2020 - 21e Congrès de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, Feb 2020, Montpellier, France. ⟨lirmm-02506440⟩
    • Carlos Franco, Vincent Augusto, Thierry Garaix, Edgar Alfonso-Lizarazo, Magali Bourdelin, et al.. Strategic territorial deployment of hospital pharmacy robots using a stochastic p-robust optimization approach. 2018 IEEE 14th International Conference on Automation Science and Engineering (CASE), Aug 2018, Munich, France. pp.390-395, ⟨10.1109/COASE.2018.8560374⟩. ⟨hal-02024966⟩
    • Thierry Georges Garaix, Matthieu Gondran, Philippe Lacomme, Dario Landa-Silva, Nikolay Tchernev. Decomposition methods for the workforce scheduling and routing problem. 29th European Conference on Operational Research (EURO), Jul 2018, Valencia, Spain. ⟨hal-02181553⟩
    • Thierry Garaix, M. Gondran, P. Ph. Lacomme, Enzo Mura, N. Tchernev. Workforce Scheduling Linear Programming Formulation. 16th IFAC Symposium on Information Control Problems in Manufacturing INCOM 2018, Jun 2018, Bergamo, Italy. pp.264-269, ⟨10.1016/j.ifacol.2018.08.289⟩. ⟨hal-02024652⟩
    • Afafe Zehrouni, Vincent Augusto, Thierry Garaix, Raksmey Phan, Xiaolan Xie. Health care emergency plan modeling and simulation in case of major flood. 2017 Winter Simulation Conference (WSC), Dec 2017, Las Vegas, NV, United States. pp.2994-3005, ⟨10.1109/WSC.2017.8248021⟩. ⟨hal-02024629⟩
    • Nizar Triki, Thierry Garaix, Xiaolan Xie. A two-phase approach for periodic home health care planning. 2014 IEEE International Conference on Automation Science and Engineering (CASE), Aug 2014, Taipei, Taiwan. pp.518 - 523, ⟨10.1109/CoASE.2014.6899375⟩. ⟨emse-01108959⟩
    • Thierry Georges Garaix, Carlos Rodriguez, Xiaolan Xie, Vincent Augusto. Dimensionnement des ressources humaines pour un service d'hospitalisation à domicile soumis à des demandes incertaines. ROADEF - 15ème congrès annuel de la Société française de recherche opérationnelle et d'aide à la décision, Société française de recherche opérationnelle et d'aide à la décision, Feb 2014, Bordeaux, France. ⟨hal-00946302⟩
    • Omar El-Rifai, Thierry Garaix, Vincent Augusto, Xiaolan Xie. Planification stochastique des ressources humaines dans un service d'urgence. GdrMacs 2013, Oct 2013, Saint Etienne, France. ⟨hal-00923982⟩
    • Omar El-Rifai, Thierry Garaix, Vincent Augusto, Xiaolan Xie. Stochastic scheduling in an emergency department. ORAHS 2013, Jul 2013, Istamboul, Turkey. ⟨hal-00923966⟩
    • Ran Liu, Xie Xiaolan, Thierry Garaix. Weekly home health care logistics. 10th IEEE International Conference on Networking, Sensing and Control, Apr 2013, Paris, France. ⟨10.1109/ICNSC.2013.6548751⟩. ⟨emse-01108920⟩
    • Nizar Triki, Xiaolan Xie, Thierry Garaix. Algorithme de voisinage pour un problème de planification de soins à domicile multi-périodique. 14th International Conference on Operations Research (ROADEF 2013), Troyes, 13 au 15 février 2013, Feb 2013, Troyes, France. ⟨hal-00802297⟩
    • Fernando Rodriguez-Verjan Carlos, Vincent Augusto, Thierry Garaix, Xiaolan Xie, Valérie Buthion. Healthcare at home facility location allocation problem. 8th annual IEEE International Conference on Automation Science and Engineering (CASE 2012), Aug 2012, Séoul, South Korea. Paper TuB4.5. ⟨hal-00777906⟩
    • Thierry Garaix, Xiaolan Xie. Consistent home health care problem. Operational Research Applied to Health Services (ORAHS 2012), Jul 2012, Enschede, Netherlands. ⟨hal-00777457⟩
    • Xiaolan Xie, Vincent Augusto, Fernando Rodriguez-Verjan Carlos, Thierry Garaix. Healthcare at home facility location-allocation problem. INFORMS 2012 International Conference, Jun 2012, Pékin (Beijing), China. ⟨hal-00777604⟩
    • Nabil Absi, Dominique Feillet, Thierry Garaix, Olivier Guyon. The City Logistics Facility Location Problem. ODYSSEUS 2012, Fifth International Workshop on Freight Transportation and Logistics, May 2012, Mykonos, Greece. ⟨emse-00718904⟩
    • Nabil Absi, Dominique Feillet, Thierry Garaix, Olivier Guyon. The City Logistics Facility Location Problem. ROADEF 2012, 13ème congrès annuel de la Société française de Recherche Opérationnelle et d'Aide à la Décision, Apr 2012, Angers, France. ⟨emse-00718894⟩
    • Olivier Guyon, Nabil Absi, Dominique Feillet, Thierry Garaix. Modélisation pour la localisation de plateformes logistiques pour le transport de marchandises en ville. 3ème Journée de Recherche "Mobilité, Transport et Logistique" (MTL 2011), Jun 2011, Lyon, France. ⟨hal-00604897⟩
    • Olivier Guyon, Nabil Absi, Dominique Feillet, Thierry Garaix. A modeling approach for locating logistics platforms for fast parcels delivery in urban areas. Seventh International Conference on City Logistics, Jun 2011, Mallorca, Spain. pp.360-368. ⟨emse-00603348⟩
    • Dominique Feillet, Thierry Garaix, Fabien Lehuédé, Olivier Péton, Dominique Quadri. A new time-consistent vehicle routing problem for the transportation of handicapped persons. Network Optimization Workshop (NOW), Aug 2010, Ajaccio, France. ⟨emse-00529945⟩
    • Dominique Feillet, Thierry Garaix, Fabien Lehuédé, Olivier Péton, Dominique Quadri. The time-consistent vehicle routing problem. Matheuristics, Jun 2010, Vienne, Austria. ⟨emse-00529948⟩
    • Dominique Feillet, Thierry Garaix, Fabien Lehuédé, Olivier Péton, Dominique Quadri. Une heuristique pour le problème de tournées de véhicules régulières. ROADEF 2010, Feb 2010, Toulouse, France. ⟨hal-00568886⟩
    • Dominique Quadri, Thierry Garaix, Dominique Feillet, Fabien Lehuédé, Olivier Péton. Conception de Tournées de Véhicules Régulières. ROADEF '09, Feb 2009, Nancy, France. ⟨hal-00385877⟩
    • Thierry Georges Garaix, Christian Artigues, Dominique Feillet, Didier Josselin. Résolution de problèmes de transport à la demande avec chemins alternatifs. MOSIM'06, Apr 2006, Rabat, Maroc. ⟨hal-01319017⟩

    Poster communications2 document

    • Louis Dublois, Thierry Garaix, Yannick Kergosien. Optimiser l’organisation des flux de patients au niveau territorial. PEPR-SanteNum 2025 - Journées annuelles du PEPR Santé Numérique, Oct 2025, Lille, France. ⟨emse-05379353⟩
    • Eric Bourreau, Thierry Garaix, Matthieu Gondran, Philippe Lacomme, Nikolay Tchernev. Problemes de coordination de tournees dans le cadre du WSRP : resolution par PPC. ROADEF 2019 - 20e Congrès de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, Feb 2019, Le Havre, France. 2019. ⟨hal-02082036⟩

    Book sections1 document

    • Christian Artigues, Cyril Briand, Thierry Garaix. Temporal Analysis of Projects Under Interval Uncertainty. Christoph Schwindt; Jürgen Zimmermann. Handbook on Project Management and Scheduling, Volume 2, 2, Springer, 2015, 9783319059143. ⟨10.1007/978-3-319-05915-0_11⟩. ⟨hal-01231039⟩

    Scientific blog post1 document

    • Jean-Charles Billaut, Christian Artigues, Thierry Garaix. La recherche opérationnelle appliquée à la logistique hospitalière en période de crise Covid19. 2020. ⟨hal-04977553⟩

    Other publications3 document

    • Thierry Garaix, Camille Breen, Mohamed El Habib Messabis, Raksmey Phan. Organisation et monitoring des capacités hospitalières en période de crise. 2022, pp.61-72. ⟨10.3917/re1.108.0061⟩. ⟨hal-04420223⟩
    • Floriant Gailliègue, M. Sarazin, Mireille Batton-Hubert, Vincent Augusto, Thierry Garaix, et al.. Etude des interactions entre le climat, les épidémies et les flux hospitaliers. 2013. ⟨emse-00915087⟩
    • Dominique Feillet, Thierry Garaix, Fabien Lehuédé, Olivier Péton, Dominique Quadri. A new consistent vehicle routing problem for the transportation of handicapped persons. 2010. ⟨emse-00555051⟩

    Theses1 document

    • Thierry Garaix. Étude et résolution exacte de problèmes de transport à la demande avec qualité de service. Modélisation et simulation. Université d'Avignon, 2007. Français. ⟨NNT : ⟩. ⟨tel-00534894⟩

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    Career

    Career

    Dec. 11 – now: Assistant professor, Center for Biomedical and Healthcare Engineering (CIS, LIMOS CNRS UMR 6158), ENSMSE.
    • Quantitative methods for modeling, simulation and optimization of healthcare production systems and new health services. Team leader : X. Xie.
    Aug. 10 – Sep. 11: Postdoc researcher, Micro-electronic Center, ENSMSE.
    • City logistics and semi-conductor production. Team leader : S. Dauzère-Péres.
    July 08 – July 10: Postdoc researcher, Politecnico di Torino (6 months at LAAS Toulouse as guest researcher).
    • Scheduling of production in industrial context (Pirelli). Robust optimization. Team leader : F. Della Croce.

    Liens externes

    Thèse en ligne Thèse.fr