Integrating heuristic information into exact methods: The case of the vertex p-centre problem

S Salhi () and A Al-Khedhairi
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S Salhi: University of Kent
A Al-Khedhairi: King Saud University

Journal of the Operational Research Society, 2010, vol. 61, issue 11, 1619-1631

Abstract: Abstract We solve the vertex p-centre problem optimally using an exact method that considers both upper and lower bounds as part of its search engine. Tight upper bounds are generated quickly via an efficient three-level heuristic, which are then used to derive potential ‘lower bounds’ accordingly. These two pieces of information when used together make our chosen exact method more efficient at obtaining optimal solutions relatively quickly. The proposed implementation produced excellent results when tested on the OR Library data set. This integrated approach can be adopted for those exact methods that consider both upper and lower bounds within their search engine and hence provide a wider spectrum of applicability in other hard combinatorial problems.

Keywords: vertex p-centre; location; set covering problem (SCP); multi-level heuristic; variable neighbourhood search (VNS); exact method (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (2)

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DOI: 10.1057/jors.2009.91

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