The 36th Conference of the European Chapter on Combinatorial Optimization will be held in Chania,
and will run from Thursday 11th to Sunday 14th May 2023. It will be hosted at the Akali Hotel in the heart of the city center and about a five-minute
walk away from the Old Town and the Venetian
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
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:
exchanging results and experiences in solving real-world combinatorial optimization problems
reporting on development and implementation of appropriate models and efficient solution methods for
combinatorial optimization problems
establishing networking contacts between individuals and research groups working on related topics
promoting the work on combinatorial optimization (theory and applications) to the broader scientific community
identifying challenging research problems for the field, as well as promising research outlets (both in theory
promoting interactions with researchers in other related fields
Topics of interest:
theory and applications of combinatorial optimization
exact solution algorithms, approximation algorithms, heuristics, and meta-heuristics for combinatorial
integer programming, global optimization, stochastic integer programming, multi-objective programming, graph
theory and network flows
application areas include logistics and supply chain optimization, manufacturing, energy production and
distribution, land consolidation, telecommunications, bioinformatics, finance, discrete tomography, discrete and
hybrid dynamical systems, and other fields
|Abstract Submission Starts
||December 5th, 2022
|Deadline for Abstract Submission
|March 5th, 2023 March 19th, 2023
|Notification of Acceptance
|March 19th, 2023 March 22nd, 2023
|Deadline for Early Registration
|April 2nd, 2023
|Deadline for Late Registration
||April 23rd, 2023
|ECCO Conference 2023
||May 11th – 14th, 2023
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
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.
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
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
, 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.
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
This plenary talk will focus on the challenging interplay between important practical and theoretical nurse
Abstract submission is already open
The process is through the EURO Abstract Submission
If you do not yet have a EURO login account, please create one. If you already have an
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.
For each submitted paper, ONE
unique registration must be submitted as well (e.g., for two submitted
papers, two separate registrations must be submitted).
|Regular Early Registration until: April 7th, 2023
|Regular Late Registration until: April 23rd, 2023
|Student Early Registration until: April 7th, 2023
|Student Late Registration until: April 23rd, 2023
|Accompanying person registration (Gala dinner & social event) until: April
|Accompanying person registration (Gala dinner, lunches & social event) until: April
Transfer costs (e.g., credit card fees, etc.) are not included in the registration fee and are paid by
Special Student Rate: A number of about 20 master/PhD 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.
Student applications with their university certificates should be submitted by email by April 2nd. The
announcement of the acceptance/rejection of the applications will be made by April 4th.
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
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
The registration must be completed by filling the registration form
Scientific & Social Programs
The Conference will take place between Thursday 11th and Sunday May 14th 2023.
Programme of Talks
The conference program is available here.
The Registration Desk will be open on Thursday 11th May at 08.45am.
Conference Dinner: On Friday 12th May at 8.00pm there will be the conference Diner at Old
Harbor of Chania.
Optional Excursion 1: Theriso - Saturday, May 13.
Optional Excursion 2: Lake Kournas – Sunday, May 14.
Information about the excurions is available here.
Those interested in participating should pay the corresponding amount
through the electronic payment system of the Conference from Monday
Wednesday, 26/4/2023 ,
noting the names of the participants. Please email the receipt of deposit or transfer to [email protected].
Book of Abstracts
The Book of Abstracts is available at the following link.
The following special issue will be devoted in papers presented in the conference: Journal of Combinatorial Optimization
All articles will be refereed according to the high standards of the journal. Details of the process will be
given during the conference.
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 31st, 2023, under the name ECCO2023.
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,
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
Greek Consulate or Embassy or http://www.mfa.gr/en/appendix/greece-bilateral-relations/a.html.
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
to contact the ECCO23 Local Organizing Commitee Chair to solicit an official letter.
- Nikolaos Matsatsinis(Chair), Technical University
- Yannis Marinakis(co-Chair), Technical
University of Crete
- Magdalene Marinaki(co-Chair), Technical
University of Crete
- Nikolaos A. Kyriakakis,
Technical University of Crete
- Garyfalia Matsatsini, Technical University of Crete
- Themistoklis Stamadianos,
Technical University of Crete
- Andromachi Taxidou, Technical University of Crete
- Lia Krassadaki, Technical University of Crete
- Maria Tsiftsoglou, Technical University of Crete
- Georgios Rafael Dimakis, Technical University of Crete
- Emmanouil Giannoulakis, Technical University of Crete
ECCO 2023 conference photos
The ECCO 2023 conference photos are available here.
ECCO 2023 conference program
The ECCO 2023 conference program has been updated and is available here.
Book of Abstracts
In the following link, you will find useful teleplone numbers and directions on how to reach the Conference
dinner ("Glossitses" tavern) from Hotel Akali. Info.
Optional excurion information
Information regarding the partitipation in the optional excurions is available here.
Student fee coverage and deadline extension
The Conference Program Committee of the 36th Conference of the European Chapter on
Optimization (ECCO XXXVI), taking into consideration:
a. its intention for participation in the conference by as many Master/PhD students as possible,
b. the current financial capabilities of the conference, and
c. the delegates' requests for a few days’ extension of the deadlines, decided:
a. covering the participation fees of about 20 Master/PhD students, and
b. the extension of the abstract submission deadlines for April 2, 2023.