About the conference
What is OR
Call for abstracts
Conference program
   Key speakers
   Detailed program
Conference dinner



Thursday, 30 January
09:10-09:30Opening sessionAmphi Cuccaroni
09:30-10:30Plenary session - Adam Letchford (Chair: Martine Labbé)Amphi Cuccaroni
10:30-11:20Coffee breakB14-B15-B16
11:20-12:40Parallel sessions
  Multi-objective Optimization
Chair: Sara Tari
Room: E501
Chair: Véronique François
Room: E502
Public Transportation
Chair: Javier Duran Micco
Room: E503
Global Optimization
Chair: Olivier Rigal
Room: E601
Analytics 1
Chair: Rafael Van Belle
Room: E602
12:40-14:10Lunch/ORBEL Board meetingB14-B15-B16/E501
14:10-15:10Parallel sessions
  Air, Rail and Multimodal Transportation
Chair: Paola Paregrini
Room: E501
Game Theory
Chair: Lotte Verdnock
Room: E502
Transportation of People
Chair: Yves Molenbruch
Room: E503
Multi-level Optimization
Chair: Concepcion Dominguez
Room: E601
Analytics 2
Chair: Vedavyas Etikala
Room: E602
15:10-15:50Coffee breakB14-B15-B16
15:50-16:40Parallel sessions
  Sport Timetabling
Chair: Dries Goossens
Room: E501
Project Management and Scheduling
Chair: Fan Yang
Room: E502
Rich Routing and Graphs
Chair: Alexandre Bontems
Room: E503
Chair: Yuan Yuan
Room: E601
Analytics 3
Chair: Jari Peeperkorn
Room: E602
16:50-17:30ORBEL general assemblyAmphi Cuccaroni
19:00-20:00CocktailBar Zango
20:30-23:00DinnerLa Terrasse des Ramparts

Friday, 31 January
09:30-10:30Plenary session - Miguel F. Anjos (Chair: Luce Brotcorne)Amphi Cuccaroni
10:30-11:20Coffee breakB14-B15-B16
11:20-12:40Parallel sessions
  Automatic Configuration and Metaheuristics Analysis
Chair: Kenneth Sorensen
Room: E501
Real Life and Integrated Problems
Chair: Jeroen Belien
Room: E502
Warehouse Management
Chair: Harol Mauricio Gamez
Room: E601
Analytics 4
Chair: Noureddine Kouaissah
Room: E602
14:10-15:10Parallel sessions
  Orbel Award
Chair: Jeroen Belien
Room: E501
Chair: Julien Dewez
Room: E502
Trucking Optimization
Chair: Hatice Çalik
Room: E601
Analytics 5
Chair: Diego Olaya
Room: E602
15:10-15:50Coffee breakB14-B15-B16
15:50-16:50Parallel sessions
  Learning and Optimization
Chair: Johan Van Kerckhoven
Room: E501
Lot-sizing and Inventory
Chair: Philippe Chevalier
Room: E502
Rich Routing
Chair: Cristian Aguayo
Room: E601
17:00-17:15ORBEL award and closing sessionAmphi Cuccaroni
17:15-18:30Closing cocktailB14-B15-B16

Thursday 11:20 - 12:40 Multi-objective Optimization
Room E501 - Chair: Sara Tari

Thursday 11:20 - 12:40 Health-care
Room E502 - Chair: Véronique François

Thursday 11:20 - 12:40 Public Transportation
Room E503 - Chair: Javier Duran Micco

Thursday 11:20 - 12:40 Global Optimization
Room E601 - Chair: Olivier Rigal

Thursday 11:20 - 12:40 Analytics 1
Room E602 - Chair: Rafael Van Belle

Thursday 14:10 - 15:10 Air, Rail and Multimodal Transportation
Room E501 - Chair: Paola Pellegrini

Thursday 14:10 - 15:10 Game Theory
Room E502 - Chair: Lotte Verdnock

Thursday 14:10 - 15:10 Transportation of People
Room E503 - Chair: Yves Molenbruch

Thursday 14:10 - 15:10 Multi-level Optimization
Room E601 - Chair: Concepcion Dominguez

Thursday 14:10 - 15:10 Analytics 2
Room E602 - Chair: Vedavyas Etikala

Thursday 15:50 - 16:50 Sport Timetabling
Room E501 - Chair: Dries Goossens

Thursday 15:50 - 16:50 Project Management and Scheduling
Room E502 - Chair: Fan Yang

Thursday 15:50 - 16:50 Rich Routing and Graphs
Room E503 - Chair: Alexandre Bontems

Thursday 15:50 - 16:50 Logistics
Room E601 - Chair: Silia Mertens

Thursday 15:50 - 16:50 Analytics 3
Room E602 - Chair: Jari Peeperkorn

Friday 11:20 - 12:40 Automatic Configuration and Metaheuristics Analysis
Room E501 - Chair: Kenneth Sorensen

Friday 11:20 - 12:40 Real Life and Integrated Problems
Room E502 - Chair: Jeroen Belien
  • Operate a Local Energy Market based on market clearing algorithms - Use case presentation
    Keno Merckx (N-SIDE)
    Co-authors: Damien Denayer
  • Simultaneously optimizing assembly line feeding and assembly line balancing
    Nico André Schmid (Ghent University)
    Co-authors: Veronique Limère, Benoit Montreuil
  • Modeling transportation mode selection in the assembly line feeding problem
    Ebenezer Olatunde Adenipekun (Ghent University)
    Co-authors: Veronique Limère, Nico André Schmid
    Feeding mixed model assembly lines with parts is a complex task in an era of mass customization, and therefore it has received increasing academic attention since the last two decades. Making feeding decisions based on an optimization model has been introduced by [2] and is referred to as the assembly line feeding problem (ALFP). Specifically, the ALFP is concerned with the assignment of every part to a line feeding policy, with the goal of minimizing total material handling costs [3]. The major feeding policies comprise line stocking (also known as bulk feeding), boxed-supply, sequencing, stationary and traveling kitting. Each feeding method has its unique procedure of providing parts to the border of line (BoL) from the warehouse, where BoL describes the area designated to store parts at every station. This research studies the ALFP by including transportation mode selection decisions. This idea is previously indicated as an interesting new research direction [3, 4], but it has not yet been approached by an overall optimization model. On the one hand, our model assigns every part to one of all five distinct feeding policies. On the other hand, it allocates transportation modes to carry out the material flows. Three transportation modes are considered: automated guided vehicle (AGV), tow train and forklift. All of these modes have specific characteristics in operation and comprise different investment costs. A quantitative model minimizing operating and investment cost for assembly line feeding is proposed. The proposed mixed integer programming (MIP) model minimizes total material handling costs incurred through four subprocesses: (1) replenishment of the preparation area; (2) preparation; (3) transportation to the line; and (4) usage at the line. The replenishment cost and the transportation cost include for every selected transportation mode an operating cost for the movement of material, and an investment cost for the acquisition of transportation equipment. The proposed model is solved using Gurobi 8.1.0 using artificial datasets. Some preliminary results will be presented. [1] Bozer, Y. A., and McGinnis, L. F., 1992. Kitting Versus Line Stocking: A Conceptual Framework and a Descriptive Model International Journal of Production Economics 28 (1): 1-19. [2] Limère, V., van Landeghem, H., Goetschalckx, M., Aghezzaf, E. H., and McGinnis, L. F., 2012. Optimising part feeding in the automotive assembly industry: Deciding between Kitting and Line Stocking. International Journal of Production Research 50 (15): 4046-4060. [3] Schmid, N. A., and Limère, V., 2019. A Classification of Tactical Assembly Line Feeding Problems. International Journal of Production Research 57 (24): 7586-7609. [4] Battini, D., Gamberi M., Persona A., and Sgarbossa F. 2015. Part-feeding with Supermarket in Assembly Systems: Transportation Mode Selection Model and Multi-scenario Analysis. Assembly Automation 35 (1): 149-159.
  • The use of integer programming for solving the daily operator assignment problem at a sheltered workshop for packaging Belgian chocolates
    Jeroen Belien (KU Leuven)
    Co-authors: Lukas Hanssens

Friday 11:20 - 12:40 Warehouse Management
Room E601 - Chair: Harol Mauricio Gamez

Friday 11:20 - 12:40 Analytics 4
Room E602 - Chair: Noureddine Kouaissah

Friday 14:10 - 15:10 Orbel Award
Room E501 - Chair: Jeroen Belien

    Friday 14:10 - 15:10 Optimization
    Room E502 - Chair: Julien Dewez

    Friday 14:10 - 15:10 Trucking Optimization
    Room E601 - Chair: Hatiz Çalik

    Friday 14:10 - 15:10 Analytics 5
    Room E602 - Chair: Diego Olaya

    Friday 15:50 - 16:50 Learning and Optimization
    Room E501 - Chair: Jorik Jooken

    Friday 15:50 - 16:50 Lot-sizing and Inventory
    Room E502 - Chair: Philippe Chevalier

    Friday 15:50 - 16:50 Rich Routing
    Room E601 - Chair: Cristian Aguayo

      ORBEL - Conference chairs: Diego Cattaruzza and Maxime Ogier