主要生产日程(1)

MasterProductionScheduleOverview•DefineMasterProductionSchedule•ExplainMPS•DiscussHowMPSWorks•ExampleFrom“RealLife”•Brainstorm:HowCanMPSHelpYourFirm?•PracticeMPSLogicWhatisMPS?•MasterProductionSchedule–Statestherequirementsforindividualenditemsbydateandquantity.-APICSMPSExplained•Breaksdown,ordisaggregates,theproductionplanintoproductfamilies•Promotesvalidorderpromises•ProvidesacommunicationmediumbetweenMarketing/SalesandOperationsExplanationContinued•Proactivelycontrolabilitytodelivergoodstocustomers•Resourceavailabilitycontrol•ProactivelycontrolinventorylevelsDisaggregatetheSalesandOperationsPlan•TheproductionplanisbrokenintoproductfamiliesPromotesValidOrderPromises•ByvalidatingthecapacityfortheMPSthroughroughcutcapacityplanning,alterativeplanscanbemadewhentherearemoreordersthanproductionMarketingOperations•Marketingcommunicatesdemandthroughcustomerordersandforecasts•OperationscommunicatescapacitythroughinventorylevelsandconstraintsResourceAvailabilityControl•Productionshortfallswillbeknownaheadoftimeandalternativeplanscanbemade.CustomerService•ProactivelycontrolabilitytodelivergoodstocustomersInventoryControl•Proactiveapproachtoinventorycontrol–Itemsarescheduledtoarrivewhenneeded–SafetystockhaslessimportancePlanningOrganizationShopFloorControlMaterialsResourceplanningMasterProductionScheduleSalesandOperationsPlanInput/OutputCapacityRequirementsPlanRoughCutCapacityPlanningResourcePlanningHowMPSWorks•InformationneededforMPSlogic–LotSize–LeadTime–ProductDemand–StartingInventoryHowMPSWorksCont.Period12345Demand3030303030Available20151050MPS5025252525W2Inc.MPSforWidgetsLotSize=25unitsLeadTime=0periodsJetSprayCorp.Example•JetSprayCorporation–Marketsdispensersforhot&coldbeverages–Usesanintegratedsystemthatincludes:•MRP•CapacityPlanning•Shopfloorcontrol•MPS•InventoryManagementExampleContinuedBrainstormingExercise•HowcananMPSsystembeusedinyourFirm?You’retheMasterScheduler…•W2Inc.isschedulingproductionforanewproductcalledtheWidget5000•StartingInventory=0•LotSize=50•Leadtime=0W2Inc.ContinuedPeriod1234567Demand2525250153525AvailableMPS50Summary•MPSbreakstheSales&Operationsplanintoproductfamilies•MaintainsDesiredLevelofCustomerService•AllowsproactivecontrolofinventoryBibliography•Sources:•CoxIII,JamesF.,andBlackstoneJr.,JohnH.,eds.APICSDictionary.1998•Vollman,ThomasE.,WilliamL.Berry,D.ClayWhybark,(1997)ManufacturingPlanningandControlSystems(4thed.).NewYorkMcGraw-Hill•APICS.(2000).BasicsofSupplyChainManagement.Virginia.