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dc.contributor.authorKoca, E.en_US
dc.contributor.authorYaman, H.en_US
dc.contributor.authorAktürk, M. S.en_US
dc.date.accessioned2016-02-08T09:51:55Z
dc.date.available2016-02-08T09:51:55Z
dc.date.issued2015en_US
dc.identifier.issn0305-0483
dc.identifier.urihttp://hdl.handle.net/11693/21848
dc.description.abstractIn this study, we consider the stochastic capacitated lot sizing problem with controllable processing times where processing times can be reduced in return for extra compression cost. We assume that the compression cost function is a convex function as it may reflect increasing marginal costs of larger reductions and may be more appropriate when the resource life, energy consumption or carbon emission are taken into consideration. We consider this problem under static uncertainty strategy and α service level constraints. We first introduce a nonlinear mixed integer programming formulation of the problem, and use the recent advances in second order cone programming to strengthen it and then solve by a commercial solver. Our computational experiments show that taking the processing times as constant may lead to more costly production plans, and the value of controllable processing times becomes more evident for a stochastic environment with a limited capacity. Moreover, we observe that controllable processing times increase the solution flexibility and provide a better solution in most of the problem instances, although the largest improvements are obtained when setup costs are high and the system has medium sized capacities.en_US
dc.language.isoEnglishen_US
dc.source.titleOmegaen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.omega.2014.11.003en_US
dc.subjectControllable processing timesen_US
dc.subjectSecond order cone programmingen_US
dc.subjectStochastic lot sizingen_US
dc.titleStochastic lot sizing problem with controllable processing timesen_US
dc.typeArticleen_US
dc.departmentDepartment of Industrial Engineering
dc.citation.spage1en_US
dc.citation.epage10en_US
dc.citation.volumeNumber53en_US
dc.identifier.doi10.1016/j.omega.2014.11.003en_US
dc.publisherElsevieren_US
dc.identifier.eissn1873-5274


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