Solving the Team Orienteering Problem with Cutting Planes

Racha El-Hajj (1, 2, 3) , Duc-Cuong Dang (2, 3, 4) , Aziz Moukrim (3, 2)

1 LU / ULB - الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth]
2 Heudiasyc - Heuristique et Diagnostic des Systèmes Complexes [Compiègne]
3 Labex MS2T - Laboratoire d'Excellence "Maîtrise des Systèmes de Systèmes Technologiques"
4 UON - University of Nottingham, UK

The Team Orienteering Problem (TOP) is an attractive variant of the Vehicle Routing Problem (VRP). The aim is to select customers and at the same time organize the visits for a vehicle fleet so as to maximize the collected profits and subject to a travel time restriction on each vehicle. In this paper, we investigate the effective use of a linear formulation with polynomial number of variables to solve TOP. Cutting planes are the core components of our solving algorithm. It is first used to solve smaller and intermediate models of the original problem by considering fewer vehicles. Useful information are then retrieved to solve larger models, and eventually reaching the original problem. Relatively new and dedicated methods for TOP, such as identification of irrelevant arcs and mandatory customers, clique and independent-set cuts based on the incompatibilities, and profit/customer restriction on subsets of vehicles, are introduced. We evaluated our algorithm on the standard benchmark of TOP. The results show that the algorithm is competitive and is able to prove the optimality for 12 instances previously unsolved.

Mots clés: independent-set cut.; Team Orienteering Problem; cutting planes; dominance property; incompatibility; clique cut

Domaines: Recherche opérationnelle [math.OC]; Combinatoire [math.CO]; Complexité [cs.CC]; Optimisation et contrôle [math.OC]

Racha El-Hajj, Duc-Cuong Dang, Aziz Moukrim. Solving the Team Orienteering Problem with Cutting Planes. Computers and Operations Research, 2016, 74, pp.21-30. ⟨10.1016/j.cor.2016.04.008⟩. ⟨hal-01300334⟩