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We are pleased to share a number of special 50th Anniversary papers published in the EURO journals in celebration of the founding of EURO in 1975. At EURO 2025 in Leeds, the 34th EURO-k conference, 16 of these authors presented 2-3 minute Elevator Pitches. Thanks to the help of the three triangle angels, all 16 talks were delivered perfectly within the time limit.

European Journal of Operational Research (EJOR)

Fifty years of research on resource-constrained project scheduling explored from different perspectives

Christian Artigues ^a, Sönke Hartmann ^b, Mario Vanhoucke ^{c d e}

^a LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France
^b HSBA Hamburg School of Business Administration, Willy-Brandt-Straße 75, D-20459, Hamburg, Germany
^c Faculty of Economics and Business Administration, Ghent University, Tweekerkenstraat 2, 9000, Gent, Belgium
^d Technology and Operations Management, Vlerick Business School, Reep 1, 9000, Gent, Belgium
^e UCL School of Management, University College London, 1 Canada Square, London, E14 5AA, United Kingdom

DOI: 10.1016/j.ejor.2025.03.024

 

Fifty years at the interface between financial modeling and operations research

Frank J. Fabozzi ^a, Maria Cristina Recchioni ^b, Roberto Renò ^c

^a The Johns Hopkins Carey Business School, Baltimore, Maryland, United States
^b Department of Economic and Social Science, University Politecnica delle Marche, Ancona, Italy
^c ESSEC Business School, France

DOI: 10.1016/j.ejor.2025.01.001

 

Fifty years of Data Envelopment Analysis

Anna Mergoni ^a, Ali Emrouznejad ^b, Kristof De Witt ^c

^a HIVA, KU Leuven, Parkstraat n. 47, 3000 Leuven, Belgium
^b Surrey Business School, Guildford, Surrey GU2 7XH, United Kingdom
^c Faculty of Business and Economics, KU Leuven, Naamsestraat n. 69, 3000 Leuven, Belgium

DOI: 10.1016/j.ejor.2024.12.049

 

Fifty years of power systems optimization

Anil Kaya ^a, Antonio J. Conejo ^b, Steffen Rebennack ^a

^a Institute for Operations Research (IOR), Stochastic Optimization (SOP), Karlsruhe Institute of Technology (KIT), Karlsruhe, 76185, Baden-Württemberg, Germany
^b Department of Integrated Systems Engineering, The Ohio State University, 1971 Neil Ave, Columbus, OH 43210, USA

DOI: 10.1016/j.ejor.2025.05.022

 

Fifty years of operational research applied to healthcare

Jeroen Beliën ^a, Sally Brailsford ^b, Erik Demeulemeester^c, Derya Demirtas ^{d e}, Erwin W. Hans ^{d e}, Paul Harper ^f

^a KU Leuven, Faculty of Business and Economics, Department of Decision Sciences and Information Management, Warmoesberg 26, 1000 Brussel, Belgium
^b Southampton Business School, University of Southampton, Southampton, UK
^c KU Leuven, Faculty of Business and Economics, Department of Decision Sciences and Information Management, Research Centre for Operations Management, Naamsestraat 69, 3000 Leuven, Belgium
^d Center for Healthcare Operations Improvement and Research, University of Twente, P.O. Box 217, 7500 AE, Enschede, the Netherlands
^e Industrial Engineering and Business Information Systems, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands
^f School of Mathematics, Cardiff University, Cardiff CF24 4AG, UK

DOI: 10.1016/j.ejor.2024.12.040

 

Fifty years of decision analysis in operational research: A review

Emanuele Borgonovo ^a, Victor Richmond R. Jose ^b, Morgan Knowlton ^c, Ross Shachter ^c, Johannes Ulrich Siebert ^d, Canan Ulu ^b

^a Department of Decision Science, Bocconi University, Milan, Italy
^b McDonough School of Business, Georgetown University, Washington DC, USA
^c Department of Management Science and Engineering, Stanford University, Stanford, CA, USA
^d Department for Business and Management, Management Center Innsbruck, Tyrol, Austria

DOI: 10.1016/j.ejor.2025.05.023

 

Fifty years of Soft Operational Research: The contribution of EURO and EJOR to its foundation and development

Leroy White

University of Exeter Business School, University of Exeter, Rennes Drive, Exeter EX4 4PU, United Kingdom

DOI: 10.1016/j.ejor.2025.05.040

 

Last fifty years of integer linear programming: A focus on recent practical advances

François Clautiaux ^a, Ivana Ljubić ^b

^a Université de Bordeaux, Institut de Mathématiques de Bordeaux, CNRS, Inria, France
^b ESSEC Business School, Cergy-Pontoise, France

DOI: 10.1016/j.ejor.2024.11.018

 

Fifty years of reliability in operations research

Terje Aven ^a, David Rios Insua ^b, Refik Soyer ^c, Xiaoyan Zhu ^d, Enrico Zio ^{e f}

^a University of Stavanger, Stavanger, Norway
^b Institute of Mathematical Sciences, Campus Cantoblanco UAM, C/ Nicolás Cabrera, 13-15, Madrid, 28049 Spain
^c Department of Decision Sciences, The George Washington University, Washington, District of Columbia, USA
^d Department of Industrial and Information Engineering, University of Tennessee, Knoxville, TN, USA
^e MINES Paris-PSL, Centre de Recherche sur les Risques et les Crises (CRC), Sophia Antipolis, France
^f Energy Department, Politecnico di Milano, Milan, Italy

DOI: 10.1016/j.ejor.2024.09.010

 

Fifty years of multiple criteria decision analysis: From classical methods to robust ordinal regression

Salvatore Greco ^a, Roman Słowiński ^{b c}, Jyrki Wallenius ^d

^a Department of Economics and Business, University of Catania, 95129 Catania, Italy
^b Institute of Computing Science, Poznań University of Technology, 60-965 Poznań, Poland
^c Systems Research Institute, Polish Academy of Sciences, 01-447 Warsaw, Poland
^d School of Business, Aalto University, P.O. Box 11000, 00076 Aalto, Finland

DOI: 10.1016/j.ejor.2024.07.038

 

Fifty years of maintenance optimization: Reflections and perspectives

Joachim Arts ^a, Robert N. Boute ^{b c d}, Stijn Loeys ^b, Heletjé E. van Staden ^e

^a Luxembourg Centre for Logistics and Supply Chain Management, University of Luxembourg, Luxembourg
^b Faculty of Economics and Business, KU Leuven, Belgium
^c Technology and Operations Management, Vlerick Business School, Belgium
^d Flanders Make@KU Leuven, Belgium
^e Michael Smurfit Graduate Business School, University College Dublin, Ireland

DOI: 10.1016/j.ejor.2024.07.002

 

Fifty years of metaheuristics

Rafael Martí ^a, Marc Sevaux ^b, Kenneth Sörensen ^c

^a Department of Statistics and Operations Research, Universitat de València, Spain
^b Lab-STICC, UMR 6285, CNRS, Université Bretagne Sud, France
^c Department of Engineering Management, University of Antwerp, Belgium

DOI: 10.1016/j.ejor.2024.04.004

 

50 years of warehousing research—An operations research perspective

Nils Boysen ^a, René de Koster ^b

^a Friedrich-Schiller-Universität Jena, Lehrstuhl für Operations Management, Carl-Zeiß-Straße 3, 07743 Jena, Germany
^b Erasmus University Rotterdam, Department of Technology and Operations Management, Burgemeester Oudlaan 50, 3062 PA Rotterdam, Netherlands

DOI: 10.1016/j.ejor.2024.03.026

 

Fifty years of portfolio optimization

Ahti Salo ^a, Michalis Doumpos ^c, Juuso Liesiö ^b, Constantin Zopounidis ^{c d}

^a Department of Mathematics and Systems Analysis, Aalto University School of Science, Finland
^b Department of Information and Service Management, Aalto University School of Business, Finland
^c Financial Engineering Laboratory, School of Production Engineering and Management, Technical University of Crete, Greece
^d Audencia Business School, France

|DOI: 10.1016/j.ejor.2023.12.031

 

Fifty Years of Operations Research in Defense

Kjell Hausken

Faculty of Science and Technology, University of Stavanger, 4036 Stavanger, Norway

DOI: 10.1016/j.ejor.2023.12.023

 

Fifty years of research in scheduling - Theory and applications

Alessandro Agnetis ^a, Jean-Charles Billaut ^{b c}, Michael Pinedo ^d, Dvir Shabtay ^e

^a Dipartimento di Ingegneria dell’Informazione, Università di Siena, via Roma 56, Siena, Italy
^b University of Tours, LIFAT (EA 6300), 64 avenue Jean Portalis, Tours, France
^c LAAS CNRS, University of Toulouse, CNRS, Toulouse, France
^d Stern School of Business, New York University, 40 West 4th Street, New York, NY, 10012, USA
^e Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer-Sheva, Israel

DOI: 10.1016/j.ejor.2025.01.034

 

Fifty Years of Location Theory - A Selective Review

Vladimir Marianov ^a, H.A. Eiselt ^b

^a Pontificia Universidad Católica de Chile and Instituto Sistemas Complejos de Ingeniería (ISCI), Santiago, Chile
^b Faculty of Management, University of New Brunswick, Fredericton, NB, Canada

DOI: 10.1016/j.ejor.2024.01.036

 

Beyond fifty years of vehicle routing: Insights into the history and the future

C. Archetti ^a, L. C. Coelho ^{b c}, M. G. Speranza ^a, P. Vansteenwegen ^d

^aDepartment of Economics and Management University of Brescia, Italy
^b Canada research chair in integrated logistics, CIRRELT, Canada
^c Université Laval, Canada
^d KU Leuven Institute for Mobility - CIB KU Leuven, Belgium

DOI: 10.1016/j.ejor.2025.06.014

 

Fifty years of multi-objective optimization and decision-making: From mathematical programming to evolutionary computation

Matthias Ehrgott ^a, Murat Köksalan ^b, Miłosz Kadziński ^c, Kalyanmoy Deb ^d

^a Department of Management Science, Lancaster University Management School, Lancaster University, Lancaster, UK
^b Ross School of Business, University of Michigan, Ann Arbor, MI 48109, USA
^c Institute of Computing Science, Poznań University of Technology, Piotrowo 2, 60-965 Poznań, Poland
^d Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 68864, USA

DOI: 10.1016/j.ejor.2025.06.012

 

Fifty Years of Inventory Research from a Forecasting Perspective

M. Zied Babai ^a, A. Syntetos ^b, R. H. Teunter ^c

^a Kedge Business School, FR
^b Cardiff University, UK
^c University of Groningen, NL

DOI: TBA

 

Fifty Years of Mixed-Integer Nonlinear and Disjunctive Programming

J. Kronqvist ^a, D. E. Bernal Neira ^b, I. E. Grossmann ^c

^a KTH Royal Institute of Technology, SE
^b Purdue University, USA
^c Carnegie Mellon University, USA

DOI: TBA

 

Fifty Years of Stochastic Simulation: Where we are and Where we Need to Go

L. J. Hong ^a, B. L. Nelson

^a University of Minnesota, USA
^b Northwestern University, USA

DOI: TBA

 

Fifty Years of Revenue Management

C. Barz ^a, J. Gönsch ^b

^a University of Zurich, CH
^b University of Duisburg-Essen, DE

DOI: TBA

 

Fifty Years of Closed-Loop Supply Chains for Reusable Products: A Review and Future Research

S.Transchel

Kuehne Logistics University, DE

DOI: TBA

 

Fifty Years of Robust Optimization

D. Bertsimas ^a, D. den Hertog ^b

^a MIT, USA
^b University of Amsterdam, NL

DOI: TBA

EURO Journal on Transportation and Logistics (EJTL)

Fifty years on maritime transportation

Marielle Christiansen ^a, Kjetil Fagerholt ^a, David Pisinger ^b

^a Department of Industrial Economics and Technology Management, Norwegian University of Science and Technology, Trondheim, Norway
^b DTU Management, Technical University of Denmark, Kgs.Lyngby, Denmark

DOI: 10.1016/j.ejtl.2024.100148

 

50 years of OR in railway timetabling and rolling stock planning

Pedro José Correia Duarte ^a, Stéphane Dauzère-Pérès ^{c g}, Dennis Huisman ^{a b}, Carlo Mannino ^d, Giorgio Sartor ^d, Norman Weik ^e, Philipp Widmann ^f

^a Econometric Institute and Erasmus Center for Optimization in Public Transport, Erasmus University Rotterdam, The Netherlands
^b Digitalization of Operations, Netherlands Railways, Utrecht, The Netherlands
^c Mines Saint-Etienne, University Clermont Auvergne, CNRS, UMR 6158 LIMOS,CMP, Department of Manufacturing Sciences and Logistics, Gardanne, France
^d SINTEF Digital, Department of Mathematics and Cybernetics, Forskningsveien 1, 0373, Oslo, Norway
^e Technical University of Munich, TUM School of Engineering and Design,Professorship for Design and Operation of Public Rail Transport Systems (RTS), Parkring 35, 85748, Garching, Germany
^f German Aerospace Center (DLR), Institute of Transportation Systems, Lilienthalplatz 7, 38108, Braunschweig, Germany
^g Department of Accounting and Operations Management, BI Norwegian Business School, Oslo, Norway

DOI: 10.1016/j.ejtl.2025.100155

 

50 years of behavioral models for transportation and logistics

Léa Ricard, Michel Bierlaire

École Polytechnique Fédérale de Lausanne (EPFL), School of Architecture, Civil and Environmental Engineering (ENAC), Transport and Mobility Laboratory, Lausanne, Switzerland

DOI: 10.1016/j.ejtl.2025.100156

 

50 years of Operations Research for the tactical planning of consolidation-based freight transportation

Teodor Gabriel Crainic, Walter Rei

School of Management, Université du Québec à Montréal, Canada
CIRRELT - Interuniversity Research Centre on Enterprise Networks, Logistics and Transportation, Canada

DOI: 10.1016/j.ejtl.2025.100157

 

50 years of Operations Research in public transport

Oded Cats ^a, Konstantinos Gkiotsalitis ^b, Anita Schöbel ^{c d}

^a Delft University of Technology, The Netherlands
^b National Technical University of Athens, Greece
^c RPTU University of Kaiserslautern-Landau, Germany
^d Fraunhofer ITWM, Germany

DOI: 10.1016/j.ejtl.2025.100160

EURO Journal on Computational Optimization (EJCO)

Interior point methods in the year 2025

Jacek Gondzio

School of Mathematics and Maxwell Institute for Mathematical Sciences, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom

DOI: 10.1016/j.ejco.2025.100105

 

Direct-search methods in the year 2025: Theoretical guarantees and algorithmic paradigms

K.J. Dzahini ^a, F. Rinaldi ^b, C.W. Royer ^c, D. Zeffiro ^b

^a Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, USA
^b Dipartimento di Matematica “Tullio Levi-Civita”, Università di Padova, Padua, Italy
^c LAMSADE, CNRS, Université Paris Dauphine-PSL, Place du Maréchal de Lattre de Tassigny, 75016 Paris, France

DOI: 10.1016/j.ejco.2025.100110

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