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2020 | OriginalPaper | Buchkapitel

Polynomial Capacity Guarantees PTAS for the Euclidean Capacitated Vehicle Routing Problem Even for Non-uniform Non-splittable Demand

verfasst von : Michael Khachay, Yuri Ogorodnikov

Erschienen in: Optimization and Applications

Verlag: Springer International Publishing

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Abstract

The Capacitated Vehicle Routing Problem (CVRP) is the well-known combinatorial optimization problem that has numerous valuable practical applications. It is known, that CVRP is strongly NP-hard even on the Euclidean plane and APX-hard in its metric setting even for any fixed capacity \(q\ge 3\). For the Euclidean setting, there are known several approximation schemes. But, to the best of our knowledge, polynomial bounds for their time complexity were proved either for a fixed capacity q or under the restriction \(q\ll n\). Moreover, most of these schemes were developed for the simplest case, where each customer has a unit demand, and cannot be extended to the general case of a non-uniform demand (both splittable or not) directly.
In this paper, we are managed to significantly relax the restriction on capacity admitting the existence of PTAS for this problem and propose the first approximation scheme for the CVRP on the Euclidean plane with non-uniform non-splittable demand parameterized by an upper bound for the size of an optimum solution. Time complexity of the proposed scheme is polynomial for any fixed parameter values if \(q=poly(n)\).

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Fußnoten
1
Like the Euclidean Traveling Salesman Problem.
 
2
To the best of our knowledge.
 
3
At least, the boxes containing the depot.
 
4
for any fixed \(J=O(r)=O(1/\varepsilon )\).
 
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Metadaten
Titel
Polynomial Capacity Guarantees PTAS for the Euclidean Capacitated Vehicle Routing Problem Even for Non-uniform Non-splittable Demand
verfasst von
Michael Khachay
Yuri Ogorodnikov
Copyright-Jahr
2020
DOI
https://doi.org/10.1007/978-3-030-38603-0_30