Scheduling Seminar: Vehicle routing: A focus on heuristic design


Datum / čas
Date(s) - 12.10.
15:00 - 17:00

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Greet Vanden Berghe (Katholieke Universiteit Leuven)

Vehicle routing: A focus on heuristic design

October 12, 2022 at 15 CET

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The abstract:
Local search-based algorithms have tended towards incorporating an ever-increasing number of heuristics for different problem classes, for example all sorts of vehicle routing generalizations. These heuristics range from all-purpose `swap‘ and `insert‘ to complicated made-to-measure operators. It has become a challenge to determine the impact of individual components on an algorithm’s performance.
In contrast to targeting generalizing problem extensions, it may be worthwhile to focus on a problem’s core when designing a basic optimization heuristic. This talk introduces a recently published local search operator for vehicle routing problems: SISRs. This heuristic is unique insofar as it seeks to induce `spatial‘ and `capacity‘ slack during a ruin phase which may subsequently be exploited in an almost-greedy recreate phase. SISRs emerged after a dedicated attempt towards solving the vehicle routing problem’s most basic special case, that is the `capacitated VRP‘.
SISRs‘ quality is validated by way of demonstrating its performance across a wide and diverse range of VRP generalizations. This confirms that the basic CVRP ruin & recreate heuristic is also effective when applied to more general vehicle problems, including fleet minimization, without the need to design additional problem-specific components.

Greet Vanden Berghe is a full professor at the Faculty of Engineering Technology, KU Leuven. More info here.


The seminar is organized by Zdeněk Hanzálek (CIIRC CTU in Prague), Michael Pinedo (New York University) and Guohua Wan (Shanghai Jiao Tong).

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