运营管理第14版蔡斯ipptchap022

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1、WorkCenterSchedulingChapterTwenty-TwoCopyright©2014byTheMcGraw-HillCompanies,Inc.Allrightsreserved.McGraw-Hill/IrwinLearningObjectivesLO22-1:Explainworkcenterscheduling.LO22-2:Analyzeschedulingproblemsusingpriorityrulesandmorespecializedtechniques.LO22-3:App

2、lyschedulingtechniquestothemanufacturingshopfloor.LO22-4:Analyzeemployeeschedulesintheservicesector.22-2ManufacturingExecutionSystemsManufacturingexecutionsystem(MES):aninformationsystemthatschedules,dispatches,tracks,monitors,andcontrolsproductionReal-timel

3、inkageto:MRPProductandprocessplanningSystemsthatextendbeyondthefactoryServiceexecutionsystem(SES):aninformationsystemthatlinksschedules,dispatches,tracks,monitors,andcontrolsthecustomer’sencounterswiththeserviceorganization22-3TheNatureandImportanceofWorkCe

4、ntersWorkcenter:anareainwhichproductionresourcesareorganizedandworkiscompletedMaybeasinglemachine,agroupofmachines,oranareawhereworkisdoneCanbeorganizedaccordingtofunction,productinaflow,orgrouptechnologyJobsneedtoberoutedbetweenfunctionallyorganizedworkcent

5、erstocompletethework22-4LoadingInfiniteloading:workisassignedtoaworkcenterbasedonwhatisneededNoconsiderationtocapacityFiniteloading:scheduleseachresourceusingthesetupandruntimerequiredforeachorderDeterminesexactlywhatwillbedonebyeachresourceateverymomentduri

6、ngtheday22-5SchedulingForwardscheduling:thesystemtakesanorderandscheduleseachoperationthatmustbecompletedforwardintimeCantelltheearliestdateanordercanbecompletedBackwardscheduling:startswithduedateandschedulestherequiredoperationsinreversesequenceCantellwhen

7、anordermustbestartedinordertobedonebyaspecificdate22-6LimitationsMachine-limitedprocess:equipmentisthecriticalresourcethatisscheduledLabor-limitedprocess:peoplearethekeyresourcethatisscheduledMostactualprocessesareeitherlaborlimitedormachinelimitedbutnotboth

8、22-7TypesofManufacturingProcessesandSchedulingApproaches22-8TypicalSchedulingandControlFunctionsAllocatingorders,equipment,andpersonnelDeterminingthesequenceoforderperformanceInitiatingperforman