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20071221ProductionPlanningandControlbhzhou@sjtu.edu.cn20071222ABC2007122320071224–(StockKeepingUnit,S.K.U.)•(Item)–(InventoryPosition)=+-(Onhand)(Onorder)(Backlog)–=-•–CI,–CT–CB20071225•––•–(Qmodel)(Fixed-orderquantitymodels)(Continuous-reviewSystem,Reorder-pointsystem)–(Pmodel)(Fixed-timeperiodmodels)(Periodic-reviewSystem,Fixed-orderintervalsystem)20071226200712272007122820071229200712210———200712211————200712212EconomicOrderQuantity(“”“”200712213Q200712214(Perpetualinventorysystem)200712215QtQ/2L————————200712216ITCDCEOQ2=0TICDCTRC2*=200712217CIQ/2CTD/QTRC(Q)QCTRC*Q*=EOQ2007122182007122194.8925.15100022=××==IToptCDCQ——$12611.8125.1289589100050.1210002=×+×+×=++=ITCQCQDDCTC13.75/36.51000=×==LdR200712220[]A2400/3.20/0.096/(1)EOQTRC(EOQ)(2)550200712221QPdImaxtP-dLQp——p——d——Imax=(p-d)ttQp=pt200712222Imax=(p-d)t=(p-d)Qp/p=Qp(1-d/p)Imax·CI=CI·Qp·(1-d/p)/2:QpQp*TRC=CI·Qp·(1-d/p)/2+D·CI/Qp)p/d(−=1C2DCQIT*p2007122231000CT=$10CI=$0.5ITCDCEOQ2=501010002.××=200=100105.010002TRC=×××=:P=8;d=6)p/d(CDCQIT*p−=12)8/61(5.01010002−××=400=50400/10*10002/5.0*100TRC=+=200712224A365000/32/0.05/1P=100d=802200712225v1v5v4v3v2Q0Q1Q2Q3Q4Q5di=(vi-vi+1)/vidi=(vi-vi+1)/vi200712226QQ1Q2CtD/QviDCiQ/2=viD+CiQ/2+CtD/Qv1=5.00v3=4.75v2=4.80200712227)()()()()()1(2)1(2)(2)()1(/2/)1()(::)1(0bbbITTITTbIbbQTICEOQTICQTICEOQTICQdEOQdCDCdrvDCdEOQDvCDCEOQTICdDvQDCQdrvQTICvrrvCQQdvQQvv≤≥−=−=+=−++−==⎩⎨⎧≤−≤≤=•••200712228149500020%%1099905.0021000199944.803200054.7512007122291Q*)(7184.750.24950002Q)(7144.800.24950002Q)(7005.000.24950002Q*3*2*1=×××==×××==×××=Q*Q1*Q2*Q3*20071223024,882.5950122.523,7502,0004.75324,72548024524,0001,0004.80225,70035035025,0007005.0012200712231200712232200712233(Periodicinventorysystem)200712234———————IzdLTQσIzLTdQσ−++=)(200712235u=350105%T=10L520I=50,Q0.95z=1.65=1.6510=16.5=20(105)16.5-50=266.5σzIzLTdQσ−++=)(200712236ArrowHarrisMarschakArrow-Harris-Marschaks-S-TTSsIOHIOHsIOHs20071223720406080100120140160180200220240123456789101112tD200712238OPLdd——d=D/NL——OP=dL=uOP=dL+SS=u+SS2007122390SS5%zxσµ=−zssσ=µx200712240u=360105%SS0.95z=1.65SS==1.6510=16.5σz20071224120071224210%70%A20%20%B70%10%C10%20%70%B70%20%10%AC10%20%0.70.901.00ABC200712243ABC200712244Step1:;Step2:;Step3:;Step4:;Step5:;Step6:20071224530,800.00150.001,050.00950.00100.001,300.002,000.00250.0022,000.00300.0040.0060.001,100.00500.003.001.052.0010.000.505.000.2511.000.100.400.102.500.255010004751026006001000200030001006004402000A——15A——34A——21B——7B——15B——28B——81CD——84CD——91G——4G——15G——25H——1020071224653.84.61.61.00.80.50.30.20.1500.00300.00250.00150.00100.0060.0040.00H——10CD——91B——81A——15B——7G——15G——4C38.524.09.84.23.63.43.13,000.001,300.001,100.001,050.00950.00B——28B——15G——25A——34A——21B7.771.471.422,000.00CD——84A%%%2007122471234567ABC
本文标题:生产与控制第3章 库存计划与控制
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