R3MRPLogic

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R3MRPLogicSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-2ThepurposeofMRPistoguaranteematerialavailabilitybyplanningforprocurementorproductionofrequiredquantities.ConvertPlannedOrderDependentReqmtsReservationsPurchaseRequisitionWarehouseProductionOrderPlannedIndRequirementsPurchaseOrderScheduleLineMaterialReqmtsPlanningSalesOrdersSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-3RSalesorder/PlannedIndRequirementPlannedorderPurchaserequisitionDependentrequirementPlannedorderDependentrequirementFinishedFinishedproductproductAssembly2Assembly1Rawmaterial3Rawmaterial1Rawmaterial2R/3’sMRPisforunconstraint-basedplanning,APOisfortheconstraint-basedplanningSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-4HowthePlanningRunWorksNetRequirementsCalculation1.DetermineAvailableWarehouseStock2.DeterminePlannedReceipts(afterconsideringexistingissuesandreceipts)3.CalculatetheShortageQuantityLotSizeCalculationDeterminethelotsizeofeachplanorder.R3LotSizingfallsinto3categories:StaticLotSize,OptimumLotSizeorPeriodLotSizeProcurementType&SchedulingIn-houseProductionorExternalProcurement&BackwardSchedulingorForwardSchedulingBOMExplosionDeterminethevalidBOMforexplosionQuotaArrangementAlotcanfurtherbesplitbyquotaarrangements(MMwillcoverthis)NetRequirementsCalculation---LotSizeCalculation-----------Scheduling--------BOMExplosion------------QuotaArrangementSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-5Firmedreceipts:productionorder,purchaseorder,firmedplannedorderRescheduleinRescheduleoutToleranceIn-houseproductiontime+Goodsreceiptprocessingtime+ReschedulinghorizonReceiptsReqmtsTimeReschedulingCheckforFirmedReceipts**ToleranceToleranceExceptionmessageExceptionmessageTheplanningrunwillnotautomaticallydisplacefirmedreceipts.SAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-6BOMExplosionSchedulingProcurementtypeLot-sizecalculationNetReqmtsCalculationNetReqmtsCalculationOverview:NetRequirementsCalculationSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-7MRP:NetRequirementsCalculationShortageShortageSalesSalesOrdersOrdersPlannedIndReqmtsPlannedIndReqmtsDependentReqmtsDependentReqmtsReservationsReservationsPlannedOrdersProductionOrdersPurchaseRequisitionsPurchaseordersWarehouseStockLotSizeSafetySafetyStockStockCompareCompareDemandSupplyMRPwillcomparetherequirementandsupplytogetashortagegap.Acomparisonismadebetweenwarehousestockandtheappropriatereceiptsandissue.Inthenetrequirementscalculation,adifferenceismadebetweenreorderpointplanning,forecast-basedplanning,andMRP.Ineachprocedure,thesystemcalculatesavailablestockdifferently.SAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-8MRPProceduresbasedonconsumptioninthepastMRPMRPProceduresProcedurescontrolledbyMRPtypeinmaterialmaster(MRP1view)MRPConsumption-basedReorderpointplanningForecast-basedplanningTime-phasedplanningW/orW/ORequirementsDeterministicPlanningSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-9MasterDataMaterialMaster(ImportantOnes)MRPGroup(MRP1)-GroupcommonMRPmaterialstogetherMRPType(MRP1)-PlanningMethod.ReorderPoint(MRP1)-ForReorderPointPlanningMethodsPlanningTimeFence(MRP1)-RestrictPlanningActivitieswithintheTimeFencePlanningCycle(MRP1)-OnlyforTimePhasedPlanningMRPController(MRP1)-PlannerforthematerialLotSizing(MRP1)-LotSizedeterminationStorageCostIndicators(MRP1)-ForOptimumLotsizingOnlyOrderingCosts(MRP1)-ForOptimumLotSizingOnlyAssemblyScrap(MRP1)-ForAssemblyScrapOnlyProcurementType(MRP2)-MakeorBuyIndicator.SpecialProcurement(MRP2)-Forstocktransfers,phantomsetc.QuotaArrangement(MRP2)-SplittingofQuotaforinternaland/orexternalprocurement(MMwillhandlethis)SAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-10MasterData(Cont’d)MaterialMaster(ImportantOnes)LeadTimes(GRandPlannedDeliveryTime)(MRP2)-ReceivingandPurchasingLeadTimesSchedulingMarginKey(MRP2)-HowexternalorinternalprocurementisscheduledSafetyStock(MRP2)-SafetyStockForecast(MRP3andForecasting)-MainlyforForecastBasedPlanning,ReOrderPointPlanningandTimePhasedPlanningPlanningStrategy(MRP3)-MainlyforFinishedGoods-tobedecidedbyAPOAvailabilityCheck(MRP3)-ATPlogicforcomponents-tobedecidedbyZL.ForFinishedGoods-tobedecidedbyAPO.Discontinuation(MRP4)-DiscontinuationbymaterialacrossallBOMsComponentScrap(MRP4)-ComponentScrapRequirementsGrouping(MRP4)-GrouprequirementsforplanningordisplayStorageLocationMRP(MRP4)-OnlyifstorageMRPisrequiredSAPAG2001,ABusinessViewofmySAPFinancials,GBUFIN-11HowthePlanningRunWorksPerMRPTypeReorderPointPlanning(REORDER)(MRPTypeVB,ReorderLevel)WhenAvailableStockfallsbelowreorderlevel,plannedordersaregeneratedintheplanningruntoorderuptoreorderlevel.SafetyStockrequirementisjustforinformationAvailableStock=PlantStock+ReceiptsReorderPointPlanning+Requirements(REORDERREQS)(MRPTypeV1,ReorderLevel)WhenAvailablestockfallsbelowreorderlevel,plannedordersaregeneratedintheplanningruntoorderuptoreorderlevel.Safetystockrequirementisjustforinformation.Thedifferencehereisthatsalesordersandreservationsarealsotakenintoaccount.AvailableStock=PlantStock+Receipts-(SalesOrders+Reservations)SAPAG2001,

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