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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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A computational study of two-period relaxations for lot-sizing problems with big-bucket capacities

Fragkos, Ioannis and Akartunali, Kerem and Doostmohammadi, Mahdi (2015) A computational study of two-period relaxations for lot-sizing problems with big-bucket capacities. In: International Workshop on Lot-Sizing, 2015-08-24 - 2015-08-26, University of Montreal, HEC.

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The multi-item Capacitated Lot-sizing problem with Setup Times (CLST) is an important problem from both a theoretical and a practical perspective. This talk is part of a research stream that studies two-period relaxations of CLST. We present computational experiments that investigate the strength of valid inequalities that are derived from two-period relaxations. Four families of valid inequalities are considered, all of which are generalisations of cover inequalities, as described in Padberg et al. We present a numerical study in which we compare the strength of these inequalities with the (l, S) inequalities of Barany et al. We find that, for certain instances, some families are very efficient, and are able to improve the lower bound by a great margin.