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1、Chapter14:TransportationinaSupplyChainExerciseSolutions1.Coal:Weevaluatethetotalcostperdayforeachoftheoptionsandselecttheonewiththelowestcost.Forthecarloadoptionthecalculationsareshownbelow:Safetyinventoryheld=2(leadtime)(dailyconsumptionrate)=2(15)(1
2、00000)=3,000,000lbsSafetyinventorycostperday=(3000000)(0.25)(0.01)/365=$20.55Cycleinventory=Q/2=100000/2=50000unitsCycleinventorycostperday=(50000)(0.25)(0.01)/365=$0.34Transportationcostperday=400(100000/10000)=$4000Totalcostperday=$420.89Otheroption
3、scanbeevaluatedinasimilarmannerWorksheet14-1providestheresultsforalltheoptions.Basedontheseresults,usingafulltrainresultsinthelowestcostperdayof$258.81MRO:SimilaranalysiscanbeundertakenfortheMROoptionandusingatruckatthesmallestshipmentsizeof1250result
4、sinthelowestcostof$139perday.Worksheet14-1depictstheseresults2.Theideaofthisexerciseistoevaluatethechangeinfacility,inventoryandtransportationcostsoncentralization.Weevaluatethecostsforthefollowingthreeoptions:·Onewarehouseisbuiltineithertheeasternorw
5、esternzone(bysymmetry,thecostswillbethesame)·Onewarehouseisbuiltinthecentralzone·AwarehouseisbuiltineachzoneOnewarehouseisbuiltintheEasternZoneThisimpliesthatanaverageof50,000booksareshippedfromtheEasterntoeachofthethreezoneweekly.Weeklytransportation
6、cost=50000*4/4(toWestern)+50000*3/4(toCentral)+50000*2/4(toEastern)=$112,5004Averagebatchsize=weeklydemand=3*50000=150,000Safetyinventory=normsinv(.997)**25000=168,267Annualfixedcostofwarehouse=200,000+1.5*(150000+168267)=$677,400Weeklyfixedcostofware
7、house=677400/52=$13,027Weeklyoperatingcostofwarehouse=0.01*150,000=$1,500Weeklycostofcyclestock=(150000/2)*10*.25/52=$3,606Weeklycostofsafetystock=168267*10*.25/52=$8,090Weeklycostofthisoption=Transportcost+facilitycost+costofinventory=$112,500+$13,02
8、7+$1,500+$3,606+$8,090=$138,722OnewarehouseisbuiltintheCentralZoneThisimpliesthatanaverageof50,000booksareshippedfromtheCentraltoeachofthethreezoneweekly.Weeklytransportationcost=50000*3/4(toWestern)+50000*2/4(toCentral)+50000*3/4(toEastern)=$
