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文档简介
MaterialRequirementPlanning(MRP)ContributorstoMRPJosephOrlickyGeorgePlosslOliverWightAmericanProductionandInventoryControlSocietyWhatisMRP?ComputerizedInventoryControlProductionPlanningSystemManagementInformationSystemManufacturingControlSystemWhentouseMRPJobShopProductionComplexProductsAssemble-to-OrderEnvironmentsDiscreteandDependentDemandItemsWhatcanMRPdo?ReduceInventoryLevelsReduceComponentShortagesImproveShippingPerformanceImproveCustomerServiceImproveProductivitySimplifiedandAccurateSchedulingReducePurchasingCostImproveProductionSchedulesReduceManufacturingCostReduceLeadTimesLessScrapandReworkHigherProductionQualityWhatcanMRPdo?ImproveCommunicationImprovePlantEfficiencyReduceFreightCostReductioninExcessInventoryReduceOvertimeImproveSupplySchedulesImproveCalculationofMaterialRequirementsImproveCompetitivePositionThreeBasicStepsofMRPIdentifyingRequirementsRunningMRP–CreatingtheSuggestionsFirmingtheSuggestionsStep1:IdentifyingtheRequirementsQuantityonHandQuantityonOpenPurchaseOrderQuantityin/orPlannedforManufacturingQuantityCommittedtoExistingOrdersQuantityForecastedStep1:ImportantInformation
MRPis…..CompanySensitiveLocationSensitiveDateSensitiveStep2:RunningMRP–CreatingtheSuggestionsCriticalItemsExpediteItemsDelayItemsStep3:FirmingtheSuggestionsManufacturingOrdersPurchasingOrdersVariousReportsOverviewoftheMRPSystemProductStructureFileMasterProductionScheduleInventoryMasterFileMaterialRequirementsPlanningManufacturingOrdersPurchaseOrdersVariousReportsMRPInputsProductStructureFileMasterProductionScheduleInventoryMasterFileProductStructureFileBillofMaterialsMasterProductionScheduleScheduleofFinishedProductsRepresentsProduction,notDemandCombinationofCustomerOrdersandDemandForecastsWhatNeedstobeProducedInventoryMasterFileOn-HandQuantitiesOn-OrderQuantitiesLotSizesSafetyStockLeadTimePast-UsageFiguresMRPProcessSchedulestheProductionofallitemsusinganMRPMatrixItem:Low-LevelCode:LotSize:LeadTime:PD12345GrossRequirementsScheduledReceiptsProjectedonHandNetRequirementsPlannedOrderReceiptsPlannedOrderReleasesMRPMatrixTermsDefinedItem–nameornumberfortheitembeingscheduledLow-LevelCode–thelowestleveloftheitemontheproductstructurefileLotSize–ordermultiplesofquantityLeadTime–thetimefromwhenanorderisplacedtowhenitisreceivedPD–PastDueTimeBucket,ordersbehindscheduleTermsDefinedGrossRequirements–demandforanitembytimeperiodScheduledReceipts–materialalreadyorderedProjectedonHand–expectedendinginventoryNetRequirements–numberofitemstobeprovidedandwhenPlannedOrderReceipts–netrequirementsadjustedforlotsizePlannedOrderReleases–plannedorderreceiptsoffsetforleadtimesExampleoftheMRPProcessItem:ALow-LevelCode:1LotSize:25LeadTime:1PD12345GrossRequirements1015252530ScheduledReceipts25ProjectedonHand20NetRequirementsPlannedOrderReceiptsPlannedOrderReleasesExampleoftheMRPProcessItem:ALow-LevelCode:1LotSize:25minLeadTime:1PD12345GrossRequirements1015252530ScheduledReceipts25ProjectedonHand201020202015NetRequirements5510PlannedOrderReceipts252525PlannedOrderReleases2525253025MRPOutputsManufacturingOrdersPurchasingOrdersVariousReportsHubbellLightingCaseManufacturesIndustrialLightingProductsGood-QualityProductsPooratMeetingDueDatesWorkisSpecializedforEachCustomerJobShopEnvironmentComplexProductsHubbellLightingCaseBeforeMRPImplementationLessthan75%oforderscompletedontimeAfterMRPImplementation97%oforderscompletedontime2%oforderscompletedwith1to2daysafterduedateSummaryofMRPMRPisa…..ComputerizedInventoryControlProductionPlanningSystemthat…..SchedulesComponentItemsasNeededwhichwill…..TrackInventoryand…..HelpyouinmanyotheraspectsofbusinessReferencesRussell,RobertaS.,andBernardW.TaylorIII.OperationsManagement.3rdEdition:PrenticeHall,2000Grubbstrom,RobertW.MaterialRequirementsPlanningandMan
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