Special issue of RAIRO-RO on "Graphs, Combinatorics, Algorithms and Optimization"

Further information and submission details.


On July 17, 2022, our friend and colleague Bernard Gendron passed away, after losing his battle against an unforgiving illness. Bernard was Professor of Operations Research in the Département d’informatique et de recherche opérationnelle (DIRO - Computer Science and Operations Research) of Université de Montréal and an important member of CIRRELT, the Interuniversity Research Centre on Enterprise Networks, Logistics and Transportation.


2021 Impact Factor – huge 81% increase to 2.526

We are pleased to report that RAIRO - Operations Research’s impact factor has increased by 81% to 2.526 and the journal is now ranked 44/87 in Operations Research & Management Science (Q3). Its CiteScore also increased significantly this year. This is an excellent result for the journal which adopted the Subscribe-to-Open (S2O) open access model in 2021.


Subscribe-to-Open 2022 Transparency Report for maths journals provides new metrics

We are pleased to share the Subscribe-to-Open (S2O) 2022 Transparency Report. The annual report details costs and prices related to the EDP Sciences-SMAI Subscribe-to-Open program for the applied mathematics journals they co-publish.


Support from library community for Subscribe-to-Open ensures continued open access for Mathematics titles in 2022

Paris, France, 8 March 2022: EDP Sciences and the Société de Mathématiques Appliquées et Industrielles (SMAI) have announced today that six mathematics journals will continue to publish in open access under the Subscribe-to-Open (S2O) model in 2022*. This demonstrates the support from the library community for this equitable open access model which enables open access publication without article processing charges (APCs).


Strong performance from maths portfolio in 2020 Journal Impact Factors from Clarivate

MMNP ranks Q1 following ground-breaking move to Subscribe-to-Open in 2020

Paris, France, 8 July 2021: We are pleased to report that our mathematics journals have performed particularly well in this year’s Journal Impact Factors ™ from Clarivate. The star performer is Mathematical Modelling of Natural Phenomena (MMNP) which increased by 153% (from 1.642 to 4.157) having already increased by 73% last year. It is now ranked 13/108 in “Mathematics, Interdisciplinary Applications”, 6/265 in “Mathematics, Applied” and 10/58 in “Mathematical & Computational Biology” – all Q1 or the top 25% of the world’s most-cited journals. Indeed, every EDP Sciences maths journal indexed in Web of Science ™ has received an increased impact factor contributing to an unprecedented year in which all eligible EDP Sciences journals increased.


Momentum builds for Subscribe-to-Open as mathematics portfolio transitions to open access

Paris, France, 19 May 2021: It is confirmed that five mathematics journals published by EDP Sciences and the Société de Mathématiques Appliquées et Industrielles (SMAI) will join Mathematical Modelling of Natural Phenomena (MMNP) in open access under the Subscribe-to-Open (S2O) model in 2021*. The transition will further bolster S2O, a transformative model first introduced by Annual Reviews and recently endorsed by cOAlition S.


Professor Nelson Maculan, RAIRO-RO co-Editor-in-Chief, elected Fellow of the Institute for Operations Research and the Management Sciences (INFORMS)

Congratulations to Prof. Nelson Maculan, co-Editor-in-Chief of RAIRO - Operations Research who has recently been elected a Fellow of the Institute for Operations Research and the Management Sciences (INFORMS). To put this in context, “INFORMS Fellows are examples of outstanding lifetime achievement in operations research and the management sciences. They have demonstrated exceptional accomplishments and made significant contributions to the advancement of OR/MS over a period of time.” (INFORMS) This honour is reserved for a few select members with a total of just twelve members being elected this year.


2019 Impact Factor: 60% increase for RAIRO-RO

RAIRO – Operations Research is delighted to announce the increase of its Impact Factor by over 60% in 2019. The Journal Citation Reports®, released by Clarivate Analytics, indicate a 2019 Impact Factor of 1.025* meaning it is ranked 67/83 in the Operations Research & Management category. This increase is complemented by a CiteScore of 1.5, ranking 97/161 in the Management Science and Operations Research Category.


EDP Sciences signed an agreement to preserve Journals with Portico (April 2015)

EDP Sciences is pleased to announce that it has signed an agreement with Portico to provide a permanent archive of the e-content for many of their key journals. Through this agreement, institutions participating in Portico’s E-Journal Preservation Service will be assured continued access to EDP Sciences content for generations of their scholars in the future.

Current data will be sent to Portico as soon as the e-journal is published, and a full list of the journals committed to the Portico archive is available at

For more information read Press Release (PDF).