A NOVEL MIXED INTEGER PROGRAMMING FORMULATION AND PROGRESSIVELY STOCHASTIC SEARCH FOR CAPACITATED LOT SIZING.pdfVIP

A NOVEL MIXED INTEGER PROGRAMMING FORMULATION AND PROGRESSIVELY STOCHASTIC SEARCH FOR CAPACITATED LOT SIZING.pdf

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A NOVEL MIXED INTEGER PROGRAMMING FORMULATION AND PROGRESSIVELY STOCHASTIC SEARCH FOR CAPACITATED LOT SIZING.pdf

JSystSciSystEng(Jun2011)20(2):173—192 ISSN:1004—3756(Paper)1861-9576(Online) DOI:l0.1007/sl15l8—0l1—5160—3 CN11—2983/N ANoVELM IXED INTEGER PRoGRAM M ING FoRM ULATIoN AND PRoGRESSIVELY SToCHASTIC SEARCH FoRCAPACITATEDLoT SIZING TaoW U DefuZHANG YanHE DepartmentofIndustrialandSystemsEngineering,UniversityofWisconsin-Madison,Madison danielwu9999@gmail.com (函) 2DepartmentofComputerScience,XiamenUniversity,361005,China StateKeyLaboratoryofMechaniealTransmission,ChongqingUniversiyt,Chongqing,400030,China A bstract Thecapacitatedmulti-levellotsizingproblem istoscheduleanumberofdifferentitemswitha bill—of-materialsstructureoverahorizonoffiniteperiods.Toadvancetechniquesofsolvingthisclass ofproblems,thispaperproposesanew mixedintegerprogramm ingformulation.Theoreticalproofs andcomputationaltestsareprovidedtoshow thatthisformulation isabletoprovidebetterlinear programmingrelaxationlowerboundsthanapreviously—proposeds~ongmixedintegerprogramming fomr ulation.Based on thenew s~ong fomr ulation,aprogressively stochastic search approach is proposed forsolvingtheproblem .Computationalresultsshowedthattheapproach generateshigh qualitysolutions,especiallyforproblemsoflargesizes. Keywords:Capacitated,multi-level,lotsizing,optimization,mixedintegerprogramming,facility 】ocatjon 1.Introduction controlsystem,such asmaterialrequirements Lotsizing investigates how to effectively planning.Thesignificanceandpracticalityofthe allocateresourcestoproducedifferentproducts problem havemotivatedagreatdealofresearch and aims to find the most cost.effi cient intheliterature. productionplan.Asoneofthemostcomnlon Tomoreeffecti

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