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A Biased-Randomized Learnheuristic for Solving the Team Orienteering Problem with Dynamic Rewards

Authors: Reyes Rubiano, Lorena Silvana; Juan Pérez, Ángel Alejandro; Bayliss, Christopher; Panadero Martínez, Javier; Faulin Fajardo, Francisco Javier; Copado Méndez, Pedro Jesús;

A Biased-Randomized Learnheuristic for Solving the Team Orienteering Problem with Dynamic Rewards

Abstract

In this paper we discuss the team orienteering problem (TOP) with dynamic inputs. In the static version of the TOP, a fixed reward is obtained after visiting each node. Hence, given a limited fleet of vehicles and a threshold time, the goal is to design the set of routes that maximize the total reward collected. While this static version can be efficiently tackled using a biased-randomized heuristic (BR-H), dealing with the dynamic version requires extending the BR-H into a learnheuristic (BR-LH). With that purpose, a 'learning' (white-box) mechanism is incorporated to the heuristic in order to consider the variations in the observed rewards, which follow an unknown (black-box) pattern. In particular, we assume that: (i) each node in the network has a 'base' or standard reward value; and (ii) depending on the node's position inside its route, the actual reward value might differ from the base one according to the aforementioned unknown pattern. As new observations of this black-box pattern are obtained, the white-box mechanism generates better estimates for the actual rewards after each new decision. Accordingly, better solutions can be generated by using this predictive mechanism. Some numerical experiments contribute to illustrate these concepts.

Keywords

learnheuristics, learnheurísticas, entradas dinámicas, Transportation, team orienteering problem, aleatorización sesgada, problema d'orientació d'equips, aleatorització esbiaixada, biased randomization, Heuristics, Team orienteering problem, Dynamic inputs, problema de orientación de equipos, transportation, entrades dinàmiques, dynamic inputs, transporte, Learnheuristics, transport, Heurística, learnheurístiques, Biased randomization

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
downloads
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10
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23
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