11th - 13th May 2023, Chania, Crete, Greece

The 36th Conference of the European Chapter on Combinatorial Optimization will be held in Chania, Crete, Greece, and will run from Thursday 11th to Saturday 13th May 2023. It will be hosted at the Arkadi Hotel in the heart of the city center and about a five-minute walk away from the Old Town and the Venetian Harbor.

ECCO (European Chapter on Combinatorial Optimization) is a Working Group of EURO (Association of European Operational Research Societies) that provides an excellent opportunity to discuss recent and important issues in Combinatorial Optimization and its applications.


Aims and Objectives

The ECCO annual meetings aim to bring together researchers in the field of Combinatorial Optimization to present their work, share experiences, and discuss recent advances in theory and applications. The primary objectives are:

Topics of interest:

Important dates

December 5th, 2022 Abstract Submission Starts
March 5th, 2023 Deadline for Abstract Submission
March 19th, 2023 Notification of Acceptance
April 2nd, 2023 Deadline for Early Registration
April 23rd, 2023 Deadline for Late Registration
May 11th – 13th, 2023 ECCO Conference 2023

Plenary Speakers

Bo Chen (University of Warwick, United Kingdom)

Title: Auctions and Bidding
The 2020 Nobel Prize in Economics was awarded to Paul Milgrom and Robert Wilson for their improvements to auction theory and inventions of new auction formats. Their theoretical discoveries have improved auctions in practice and benefited sellers, buyers and taxpayers around the world (RSAS, 2020). Auction theory provides an explicit model of price making and auctions are of consider-able practical significance. Auction theory is closely linked to game theory, combinatorial optimization and computational complexity. In the first half of my talk, I will give a brief overview of auction theory and practice. I will introduce some key concepts and results in auction theory, then provide some examples of best auction practice, and conclude with pointers to some seminal full-review articles. In the second half of my talk, I will present my recent studies on some auction problems in the electricity capacity market.

Nelson Maculan (Federal University of Rio de Janeiro, Brazil)

Title: Euclidean Steiner Tree Problem in Rn: Optimization Models and New Heuristics
We will briefly introduce the Euclidean Steiner Tree Problem in Rn and its most important properties. We will show the construction and computational behavior of nonlinear optimization models with mixed integer variables and their continuous relaxations. Two new heuristics with their respective numerical tests will also be presented.
Note: This is a joint work with Hacène Ouzia (LIP6 - Sorbonne Université, France) and Renan V. Pinto (Federal University of Rio de Janeiro – UFRJ, Brazil).
Part of the topics presented at this conference were published in: 1-Hacène Ouzia, Nelson Maculan, Mixed Integer Nonlinear Optimization Models for the Euclidean Steiner Tree Problem in Rd, Journal of Global Optimization (JOGO), v. 83, pp 119-136, 2022.
2-Renan V. Pinto, Nelson Maculan, A New Heuristic for the Euclidean Steiner Tree Problem in Rn, to be published in TOP.

Greet Vanden Berghe (KU Leuven, Belgium)

Title: Personnel rostering: trends and challenges in theory and practice
Personnel rostering represents a fascinating combinatorial optimisation problem due to its socio-economic relevance, its potential for improvement through automated decision support and its computational complexity.
The optimisation problem has yielded ample practice-oriented operational research approaches. Despite the vast amount of academic research results, it remains hard for novice developers to profit from general insights or re-usable models and algorithms. This `cold startʼ issue can be partially explained by complicated regulations typical for personnel environments with 24/7 duties and different in almost every organisation. The very same issue also persists due to the lack of a theoretical framework for nurse rostering.
From an academic point of view, interesting models have been developed for varying nurse rostering problems. The approaches range from self-rostering and manual problem decompositions to different levels of automated decision support.
This plenary talk will focus on the challenging interplay between important practical and theoretical nurse rostering contributions.

Abstract Submissions

Abstract submission is already open

The process is through the EURO Abstract Submission System.

If you do not yet have a EURO login account, please create one. If you already have an account, for example from the previous EURO or IFORS conferences, you will be able to login using your credentials.
Abstracts must be written in English and contain no more than 1,500 characters in plain text format (no formulas are allowed).
Please note that the submission MUST be done by the person who will present the paper and will be shown as first author. No change to the speaker (first author) will be allowed later.

Each participant is allowed to present at most ONE paper at the conference.


Registration type Cost (€)
Regular Early Registration until: April 2nd, 2023 190
Regular Late Registration until: April 23rd, 2023 240
Student Early Registration until: April 2nd, 2023 130
Student Late Registration until: April 23rd, 2023 180
Accompanying person registration (Gala dinner & social event) until: April 23st, 2023 50
Accompanying person registration (Gala dinner, lunches & social event) until: April 23rd, 2023 80

Transfer costs (e.g., credit card fees, etc.) are not included in the registration fee and are paid by the delegate.

Special Student Rate: A limited number of students will be supported and can apply for the Special Student Rate. To qualify for the Special Student Rate, students need to provide official evidence of their studentship from their institution on a stamped letterhead.

The category (early/late) of the registration fees are determined by the date the payment is made, not the date of registration.

Cancellation policy: The registration of participation is binding. Cancellation of registration must be submitted in writing via email. Cancellations received before 23 April 2023 are subject to a 20% administrative fee. No refunds will be paid after 23 April 2023.

Registration payment system is available through the following link of the Technical University of Crete:

The registration must be completed by filling the registration form here.

Scientific & Social Programs

The Conference will take place between Thursday 11th and Saturday May 13th 2023.

Programme of Talks

  • The conference program will be announced on April 23rd, 2023.
  • The Registration Desk will be open on Tuesday 11th May at 08.00am.

Social Events

  • Conference Guided Tour: On Friday 12th May in the afternoon there will be a guided tour of the old town of Chania.
  • Conference Dinner: On Friday 12th May at 8.00pm there will be the conference Diner at Old Harbor of Chania.
  • Optional Excursion 1 with dinner on Saturday afternoon: Theriso (Information will be announced).
  • Optional Excursion 2 with Lunch on Sunday: Knossos & Museum (Information will be announced).


The conference takes place at the Civitel Akali

Travel & Accommodation

The following links provide information on how to reach Chania by ship or plane via Athens, as well as, information on transportation between airports, ports and ciy center:

The hotel where the conference will be held offers the following special rates for conference participants:

  • Standard single room = 95.00 € BB
  • Standard double or Twin room =120.00 € BB
  • Superior Double for single use = 115.00 € BB
  • Superior twin room = 150.00 € BB

The above prices include a rich breakfast and all taxes.
In addition, there is an accommodation tax of 3.00 € per day per room.
Reservations can be made until March 10th, 2023, under the name ECCO2023.

Travel Documents

  • Citizens of European Union countries do not require a visa to enter Greece and will only require a valid passport or for Schengen countries, an identification card. Citizens of Australia, Canada, Isreael, Japan, New Zealand, Iceland, Switzerland, and USA do not require a visa in order to enter Greece for a period of less than 3 months.
  • Citizens of countries other than the ones mentioned should contact their nearest Greek Consulate or Embassy or Please make sure that you deal with these matters as early as possible, in case you encounter unexpected processing delays and difficulties.
  • Participants of the conference that require visas in order to travel to Greece are kindly asked to contact the ECCO23 Local Organizing Commitee Chair to solicit an official letter.


Program committee

Organizing committee



This section will hold any updates regarding the ECCO 2023 Conference.