数据、模型与决策(运筹学)课后习题和案例答案019费

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1、CHAPTER19INVENTORYMANAGEMENTWITHUNCERTAINDEMANDReviewQuestions19.1-1Freddieshouldconsiderthetrade-offbetweentoomuchinventoryandtoolittleinventory・19.1-2BasedonFreddie^sdata,9,10,and11aretheonlynumbersofcopiesthathehassoldinthepast.19.1-3Thestateofnatureforeachdayisthenumberofrequeststopurchaseacopyt

2、hatwilloccur.Thenumberofrequestsisthestateofnaturebecauseitistherandomvariable.19.2-1Onlyasingletimeperiodisneededbecauseperishableproductscannotbesoldlater.19.2-2Theonlydecisiontobemadeishowmanyunitstoordersotheycanbeplacedintoinventoryatthebeginningoftheperiod.19.2-3Itisassumedthatthedemandduringt

3、heperiodisuncertainbutthattheprobabilitydistributionofdemandisknown.19.2-4Theunitcostofunderorderingisthedecreaseinprofitthatresultsfromfailingtoorderaunitthatcouldhavebeensoldduringtheperiod.Theunitcostofoverorderingisthedecreaseinprofitthatresultsfromorderingaunitthatcouldnotbesoldduringtheperiod.

4、19.2-5Bayes'decisionmlewillmakethesamedecisionsincebothapproachesareapplyingBayes'decisionrule,butwithdifferentpayoffs,whereoneistobemaximizedandtheotherminimized.19.2-6Theservicelevelistheprobabilitythatnoshortagewilloccur.19.2-7Optimalservicelevel=Cunder/(Cunder+Cover)-19.2-8Thepointatwhichtheopti

5、malservicelevelhitsthecumulativedistributionfunctiongivestheoptimalorderquantity.19.2-9Yes.19.3-1Therehavebeenfourstockoutsofpanoramicdisposablecamerasduringtheyearwithdurationsrangingfromafewdaystoacoupleweeks.19.3-2Recentcomplaintsfromdistributorsaboutdelaysinshippingthedisposablepanoramiccameraha

6、veconcernedtheVicePresidentforMarketingandsheissuggestinghavingmorefrequentproductionrunstokeeptheinventorybetterstocked.19.3-3TheDivisionVicePresidentforProductionisconcernedaboutthefrequentinterruptionsintheproductionofothermodelscausedbysettingupforaproductionrunforthedisposablepanoramiccameras.H

7、eisrecommendinghavingmuchlongerproductionrunsmuchlessfrequently.19.3-4TheDivisionPresidentisskepticalabouthisVicePresidentsrecommendationbecauseitwouldincreaseinventorylevels.Hehasbeenpromotingthejust