生产运作管理-10库存管理

ProductionandOperationsManagementforundergraduate(本课程为中山大学精品课程与立体化教学改革课程),SCHOOLofBUSINESS,SUNYAT-SENUNIVERSITYLecturer:ChenZhixiangPh.D.2010-03-01,Contentoutlineandclassscheduling,Contentoutline,InventorycostsTypesofinventoryFormsofinventoryEconomicorderquantityContinuousreviewsystem(Qsystem)Periodreviewsystem(Psystem),InventoryCosts,InterestorOpportunityCostStorageandHandlingCostsTaxes,Insurance,andShrinkage,InventoryCosts,CustomerServiceOrderingCostSetupCostLaborandEquipmentUtilizationTransportationCostsPaymentstoSuppliers,TypesofInventory,Q,Q/2,TypesofInventory,SafetyStockInventory,AnticipationInventory,TypesofInventory,Cycleinventory=Q/2=280/2=140drills,Formsofinventory,Inventoryisabout30%ofcurrentassetsintypicalfirm,EconomicOrderQuantity,DemandrateisconstantNoconstraintsonlotsizeOnlyrelevantcostsareholdingandordering/setupDecisionsforitemsareindependentfromotheritemsNouncertaintyinleadtimeorsupply,Assumptions,EconomicOrderQuantity,EconomicOrderQuantity,EconomicOrderQuantity,EconomicOrderQuantity,Birdfeedercosts(textbookpage333),C=$2925+$108=$3033,EconomicOrderQuantity,EconomicOrderQuantity,EconomicOrderQuantity,Birdfeedercosts,EconomicOrderQuantity,Birdfeedercosts,EconomicOrderQuantity,Birdfeedercosts,EconomicOrderQuantity,EconomicOrderQuantity,EconomicOrderQuantity,Timebetweenorders,TBOEOQ=(75/936)(12)=0.96monthsTBOEOQ=(75/936)(52)=4.17weeksTBOEOQ=(75/936)(365)=29.25days,ContinuousReview,ContinuousReview,UncertainDemand,Figure15.8,ReorderPoint/SafetyStock,ReorderPoint/SafetyStock,SafetyStock/R,Safetystock=zsL=2.33(22)=51.3=51boxesReorderpoint=ADDLT+SS=250+51=301boxes,PeriodicReviewSystems,PeriodicReviewSystems,T=Averagedemandduringtheprotectioninterval+Safetystock=d(P+L)+zsP+L=(18units/week)(16weeks)+1.28(12units)=