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Proceedings of the 17th Conference on Computer Science and Intelligence Systems

Annals of Computer Science and Information Systems, Volume 30

Team Orienteering Problem with Time Windows and Variable Profit

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DOI: http://dx.doi.org/10.15439/2022F158

Citation: Proceedings of the 17th Conference on Computer Science and Intelligence Systems, M. Ganzha, L. Maciaszek, M. Paprzycki, D. Ślęzak (eds). ACSIS, Vol. 30, pages 347350 ()

Full text

Abstract. The Orienteering Problem (OP) is a combinatorial optimization and integer programming problem whose goal is to obtain the optimal route for a vehicle to traverse to deliver to a given set of customers. The objective is to select a subset of nodes to visit to maximize the total collected score given a limited time budget. The OP has numerous applications in various fields such as logistics and tourism. Several variants have been studied, including the Team Orienteering Problem (TOP), the Orienteering Problem with Time Windows (OPTW), and the TOP with Variable Profits (TOPVP). This paper introduces the Team OP with Time Windows and Variable Profits (TOPTWVP). In this case, each node has a predefined time window in which the service must start (in case this node is visited), and the vehicle may spend an amount of time given by a predefined interval so that the profit collected at this node depends on the time spent. We first propose a mathematical model for the TOPTWVP and use OR-Tools to solve small modified benchmark instances. We then propose an algorithm based on Iterated Local Search to solve more difficult modified benchmark instances. The results show that our approach can solve difficult instances with good quality.

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