Abstract
We study the recent metaheuristic search algorithm for the multidimensional assignment problem (MAP) using fitness landscape theory. The analyzed algorithm performs a very large-scale neighborhood search on a set of feasible solutions to the problem. We derive properties of the landscape graphs that represent these very large-scale search algorithms acting on the solutions of the MAP. In particular, we show that the search graph is a generalization of a hypercube. We extend and generalize the original very large-scale neighborhood search to develop the variable neighborhood search. The new search is capable of searching even larger large-scale neighborhoods. We perform numerical analyses of the search graph structures for various problem instances of the MAP and different neighborhood structures of the MAP algorithm based on a very large-scale search. We also investigate the correlation between fitness (i.e., objective values) and distance (i.e., path lengths) of the local minima (i.e., sinks of the landscape). Our results can be used to design improved search-based metaheuristics for the MAP.
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Data availability
Because of the size of the simulated data, it is neither practical nor necessary to share all data that we generated or analyzed during this study. The minimal dataset that would be necessary to interpret, and build upon the findings reported in the article consists of numerous tables and figures, all of which are included in this published article. For purpose of the replication, the authors will make the code used to simulate the data available via GitHub.
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A. Kammerdiner was supported by the AFRL (National Research Council Fellowship).
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Appendix
Appendix
This section supplements the numerical results in Sect. 5.3. Below we present the results of pairwise comparison of three alternative traversal strategies (i.e., BFS, DFS, and BsFS) of the VNS and VLSN algorithms with Random Key GA. To statistically compare the pairs of algorithms, we construct 95% confidence intervals for the differences in the objective values as described in Sect. 5.1.
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Kammerdiner, A., Semenov, A. & Pasiliao, E.L. Landscape properties of the very large-scale and the variable neighborhood search metaheuristics for the multidimensional assignment problem. J Glob Optim 88, 653–683 (2024). https://doi.org/10.1007/s10898-023-01285-w
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DOI: https://doi.org/10.1007/s10898-023-01285-w