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1、R3MRPLogic ThepurposeofMRPistoguaranteematerialavailabilitybyplanningforprocurementorproductionofrequiredquantities Convert Planned Order DependentReqmts Reservations Purchase Requisition Warehouse Production Order PlannedIndent Requirements Purchase Order Schedule Line Material Reqmts Planning Sale
2、s Orders Salesorder Planned Ind Requirement Plannedorder Purchaserequisition Dependentrequirement Plannedorder Dependentrequirement Finished Finished product product Assembly2 Assembly1 Raw material3 Raw material1 Raw material2 R 3 sMRPisforunconstraint basedplanning APOisfortheconstraint basedplann
3、ing HowthePlanningRunWorks NetRequirementsCalculation1 DetermineAvailableWarehouseStock2 DeterminePlannedReceipts afterconsideringexistingissuesandreceipts 3 CalculatetheShortageQuantityLotSizeCalculationDeterminethelotsizeofeachplanorder R3LotSizingfallsinto3categories StaticLotSize OptimumLotSizeo
4、rPeriodLotSizeProcurementType SchedulingIn houseProductionorExternalProcurement BackwardSchedulingorForwardSchedulingBOMExplosionDeterminethevalidBOMforexplosionQuotaArrangementAlotcanfurtherbesplitbyquotaarrangements MMwillcoverthis NetRequirementsCalculation LotSizeCalculation Scheduling BOMExplos
5、ion QuotaArrangement Firmedreceipts productionorder purchaseorder firmedplannedorder Reschedule in Rescheduleout Tolerance In houseproductiontime Goodsreceipt processingtime Reschedulinghorizon Receipts Reqmts Time Rescheduling Check forFirmedReceipts Tolerance Tolerance Exception message Exception
6、message Theplanningrunwillnotautomaticallydisplacefirmedreceipts BOMExplosion Scheduling Procurementtype Lot sizecalculation NetReqmtsCalculation NetReqmtsCalculation Overview NetRequirementsCalculation MRP NetRequirementsCalculation Shortage Shortage Sales Sales Orders Orders PlannedIndReqmts Plann
7、edIndReqmts DependentReqmts DependentReqmts Reservations Reservations Planned Orders Production Orders PurchaseRequisitions Purchaseorders Warehouse Stock Lot Size Safety Safety Stock Stock Compare Compare Demand Supply MRPwillcomparetherequirementandsupplytogetashortagegap Acomparisonismadebetweenw
8、arehousestockandtheappropriatereceiptsandissue Inthenetrequirementscalculation adifferenceismadebetweenreorderpointplanning forecast basedplanning andMRP Ineachprocedure thesystemcalculatesavailablestockdifferently MRP Procedures basedonconsumption in thepast MRP MRP Procedures Procedures controlled
9、by MRP type in materialmaster MRP1view MRP Consumption based Reorderpoint planning Forecast based planning Time phased planning W orW ORequirements DeterministicPlanning MasterData MaterialMaster ImportantOnes MRPGroup MRP1 GroupcommonMRPmaterialstogetherMRPType MRP1 PlanningMethod ReorderPoint MRP1
10、 ForReorderPointPlanningMethodsPlanningTimeFence MRP1 RestrictPlanningActivitieswithintheTimeFencePlanningCycle MRP1 OnlyforTimePhasedPlanningMRPController MRP1 PlannerforthematerialLotSizing MRP1 LotSizedeterminationStorageCostIndicators MRP1 ForOptimumLotsizingOnlyOrderingCosts MRP1 ForOptimumLotS
11、izingOnlyAssemblyScrap MRP1 ForAssemblyScrapOnlyProcurementType MRP2 MakeorBuyIndicator SpecialProcurement MRP2 Forstocktransfers phantomsetc QuotaArrangement MRP2 SplittingofQuotaforinternaland orexternalprocurement MMwillhandlethis MasterData Cont d MaterialMaster ImportantOnes LeadTimes GRandPlan
12、nedDeliveryTime MRP2 ReceivingandPurchasingLeadTimesSchedulingMarginKey MRP2 HowexternalorinternalprocurementisscheduledSafetyStock MRP2 SafetyStockForecast MRP3andForecasting MainlyforForecastBasedPlanning ReOrderPointPlanningandTimePhasedPlanningPlanningStrategy MRP3 MainlyforFinishedGoods tobedec
13、idedbyAPOAvailabilityCheck MRP3 ATPlogicforcomponents tobedecidedbyZL ForFinishedGoods tobedecidedbyAPO Discontinuation MRP4 DiscontinuationbymaterialacrossallBOMsComponentScrap MRP4 ComponentScrapRequirementsGrouping MRP4 GrouprequirementsforplanningordisplayStorageLocationMRP MRP4 OnlyifstorageMRP
14、isrequired HowthePlanningRunWorksPerMRPType ReorderPointPlanning REORDER MRPTypeVB ReorderLevel WhenAvailableStockfallsbelowreorderlevel plannedordersaregeneratedintheplanningruntoorderuptoreorderlevel SafetyStockrequirementisjustforinformationAvailableStock PlantStock ReceiptsReorderPointPlanning R
15、equirements REORDERREQS MRPTypeV1 ReorderLevel WhenAvailablestockfallsbelowreorderlevel plannedordersaregeneratedintheplanningruntoorderuptoreorderlevel Safetystockrequirementisjustforinformation Thedifferencehereisthatsalesordersandreservationsarealsotakenintoaccount AvailableStock PlantStock Recei
16、pts SalesOrders Reservations HowthePlanningRunWorksPerMRPType ForecastBasedPlanning FORECAST MRPTypeVV CreateForecast Systemonlyconsidersforecastrequirements anyotherrequirementsarenotconsidered Plannedordersareproposedwhenavailablestockislessthanforecastrequirements AvailableStock Plantstock SafetyStock Receipts ForecastRequirementsTimePhasedPlanning TIMEPLAN MRPTypeR1 PlanningCycle CreateForecast MaterialisplannedaccordingtosamecycleinwhichitisdeliverediethematerialisnotplannedduringthenormalM
