Publication Type
Conference Proceeding Article
Version
publishedVersion
Publication Date
8-2018
Abstract
This paper focuses on a recent variant of the Orienteering Problem (OP), namely the Capacitated Team Orienteering Problem (CTOP). In this problem, each node is associated with a demand that needs to be satisfied and a score that need to be collected. Given a set of homogeneous fleet of vehicles, the main objective is to find a path for each available vehicle in order to maximize the total score, without violating the capacity and time budget of each vehicle. We propose an Iterated Local Search algorithm that has been applied in solving various variants of the OP. We propose two ILS algorithms with the main difference lies on the implementation of local search operators. For solving small instances, we implement two different strategies, either accepting a new solution as long as it improves the quality of the solutions or accepting a new solution as long as there is no constraint violation. For solving large instances, we simplify the move operator of local search in order to reduce the computational time. Instead of exploring all possible nodes in all paths to be moved, we only focus on nodes in the path with the least remaining amount of time. Computational experiments on benchmark data sets illustrate the efficiency and effectiveness of the proposed approach.
Keywords
Orienteering problem, Iterated local search, Capacitated orienteering problem
Discipline
Operations Research, Systems Engineering and Industrial Engineering | Theory and Algorithms
Research Areas
Intelligent Systems and Optimization
Publication
Proceedings of the 12th International Conference on the Practice and Theory of Automated Timetabling (PATAT 2018), Vienna, Austria, August 28-31
First Page
493
Last Page
496
ISBN
9780992998424
Publisher
PATAT
City or Country
Vienna
Citation
GUNAWAN, Aldy; NG, Kien Ming; YU, Vincent F.; ADIPRASETYO, Gordy; and LAU, Hoong Chuin.
Iterated local search algorithm for the capacitated team orienteering problem. (2018). Proceedings of the 12th International Conference on the Practice and Theory of Automated Timetabling (PATAT 2018), Vienna, Austria, August 28-31. 493-496.
Available at: https://ink.library.smu.edu.sg/sis_research/4373
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Included in
Operations Research, Systems Engineering and Industrial Engineering Commons, Theory and Algorithms Commons