14USTB OM Homework Assignments北京科技大学运营管理作业答案.docx
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14USTBOMHomeworkAssignments北京科技大学运营管理作业答案
USTB
OperationsManagement
HomeworkAssignments
By
Dr.Zhu,xiaoning
StudentName:
黄诗蕴
Take-HomeProblemSolvingandEssayQuestions
Problem#1-DecisionScience(Module10DecisionAnalysisused)
ABCisplanningtopublish2CDtitles:
Discosin70’sandRomantic60’s.Itisexpectedthatpayofffrom70’swillbe$100Kifdemandislowand$600Kifdemandishigh.Itisalsoexpectedthatpayofffrom60’swillbe$200Kifdemandislowand$400Kifdemandishigh.
a)WhichtitleshouldABCgoesfirstbasedonMaximin(中间),Maximax(第一个),MinimaxRegretandLaplace(最后)?
b)Giveyourfinalrecommendation.
(a)
Maximin如下图
分析:
保守型方案,认为两种CD需求都low,但是推荐价格高的商品(60s的CD)
Maximax如下图
分析:
乐观方案,认为两种商品需求都高。
并且推荐价格更高的商品(60s的CD)。
Minimaxregretandlaplace如下图
分析:
悲观的方案,认为两种CD需求都小,使用Minimax,得出解决方案为70s定价为$100K,60s定价为$200K。
并且推荐价格低的商品(70s)
(b)综合分析
Maxmin策划的分析:
保守型方案,认为两种CD需求都low,因此得出解决方案为70s定价为$100K,60s定价为$200K。
但是推荐价格高的商品(60s的CD)。
Maximax分析:
乐观方案,认为两种商品需求都高。
因此得出解决方案为70s定价为$600K,60s定价为$400K,并且推荐价格更高的商品(70s的CD)。
Minmax策划的分析:
悲观的方案,认为两种CD需求都小。
得出解决方案为70s定价为$100K,60s定价为$200K。
并且推荐价格低的商品(70s)
Problem#2-WaitingLineModel(Module9WaitingLinesused)
Assuming25customersarearrivingasthePoissonprobabilitydistributionwithinonehourandtheservicerateistwominutespercustomerasexponentialprobabilitydistributioninaone-linefacility.Assumingthewaitingcostpertimeperiodforeachunitis$20andtheservicecostpertimeperiodforeachchannel$18.
a)Foreconomiccostanalysis,howmanychannelsshouldcompanyset?
b)Giveyourreasons.
(a)
实验得,当channel为3,总费用为$71.11
实验得,当channel为4,总费用为$88.72
实验得,当channel为2,总费用为$56.17
实验得,当channel为1,总费用为$118
综上所述,在channel为2时,费用最低,为$56.17,之后随着channel数量增大,费用变高。
Problem#3-TransportationProblem(Module2Transportationused)
ArizonaPlumbingwhichmakes,amongotherproducts,afulllineofbathtubs.Tobesuccessful,thefirmmustdecidewhichofitsfactoriesshouldsupplywhichofitswarehouses.RelevantdataforArizonaPlumbingarepresentedinthefollowingtableshows,forexample,thatitcostsArizonaPlumbing5$toshiponebathtubfromitsDesMoinesfactorytoitsAlbuquerquewarehouse,$4toBoston,and3$toCleveland.Likewise,weseeinthefigurethatthe300unitsrequiredbyArizonaPlumbing’sAlbuquerquewarehousemightbeshippedinvariouscombinationsfromitsDesMoines,Evansville,andFortLauderdalefactories.
To
From
Albuquerque
Boston
Cleveland
DesMoines
Evansville
FortLauderdale
$5
$8
$9
$4
$4
$7
$3
$3
$5
demand300200200
a)Prepareasimpletableforshippingroutesfromoriginstodestinations.
b)Findtheminimaltotalshippingcost.
(a)
(b)
最小费用为$3900
Problem#4-InvenrotyManagement(Module8Inventoryused)
GreenTeaAAAInc.hasanearconstantdemandsonpropaneof3000literspermonthwithunitpriceof$1.00;thefirm’scostofcapitalis10%andotherannualholdingcostis5%;theorderingcostis$10flateachtime.Thefirmisoperating360daysyearandittakes4workingdaysforpropanedelivery.
a)Howmuchtoordereachtime?
b)Whentoorder(whileinventoryisfallentowhatlevel…)?
(a)
Orderpointis400,numberoforderis2190.89,priceoforderis$2190.89.
存货达到400开始订货,一年花费$328.32
Problem#5-InvenrotyManagementwithQuantityDiscount(Module8Inventoryused)
JohnsonClothingInc.hastherelatedinventorydatashownbelow:
Itsannualdemandis2000unitswiththeannualinventoryholdingcostof20%andtheorderingcostof$20perorder.Thefirmisoperating250daysperyearandittakes5workingdaysforpropanedelivery.
OrdersizeDiscountUnitcost
0-990%$10.00
100-2991%$9.90
300-9992%$9.80
1000andover3%$9.70
a)Whatisthebest-orderedunit?
b)Whentoorder(whileinventoryisfallentowhatlevel…)?
a)thebest-orderedunitis300.00
b)存货低于recordpoint(40.00)时候开始订货。