A multi-exchange local search algorithm for the capacitated facility location problem - (Extended abstract)
UNSPECIFIED (2004) A multi-exchange local search algorithm for the capacitated facility location problem - (Extended abstract). In: 10th International Integer Programming and Combinatorial Optimization Conference, JUN 07-11, 2004, New York, NY.Full text not available from this repository.
We present a multi-exchange local search algorithm for approximating the capacitated facility location problem (CFLP), where a new local improvement operation is introduced that possibly exchanges multiple facilities simultaneously. We give a tight analysis for our algorithm and show that the performance guarantee of the algorithm is between 3 + 2root2 - epsilon and 3 + 2 root2 + epsilon for any given constant epsilon > 0. Previously known best approximation ratio for the CFLP is 7.88, due to Mahdian and Pal (2003), based on the operations proposed by Pal, Tardos and Wexler (2001). Our upper bound 3 + 2root2 + epsilon also matches the best known ratio, obtained by Chudak and Williamson (1999), for the CFLP with uniform capacities. In order to obtain the tight bound of our new algorithm, we make interesting use of the notion of exchange graph of Pal et al. and techniques from the area of parallel machine scheduling.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software|
|Series Name:||LECTURE NOTES IN COMPUTER SCIENCE|
|Journal or Publication Title:||INTEGER PROGRAMMING AND COMBINATORIAL OPTIMIZATION, PROCEEDINGS|
|Editor:||Bienstock, D and Nemhauser, G|
|Number of Pages:||15|
|Page Range:||pp. 219-233|
|Title of Event:||10th International Integer Programming and Combinatorial Optimization Conference|
|Location of Event:||New York, NY|
|Date(s) of Event:||JUN 07-11, 2004|
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