供应链管理第三版Unit7习题与答案.docx
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供应链管理第三版Unit7习题与答案.docx
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供应链管理第三版Unit7习题与答案
Chapter7
DemandForecastinginaSupplyChain
True/False
1.Theforecastofdemandformsthebasisforallstrategicandplanningdecisionsinasupplychain.
Answer:
True
Difficulty:
Moderate
2.Throughoutthesupplychain,allpullprocessesareperformedinanticipationofcustomerdemand,whereasallpushprocessesareperformedinresponsetocustomerdemand.
Answer:
False
Difficulty:
Easy
3.Forpullprocesses,amanagermustforecastwhatcustomerdemandwillbeinordertoplanthelevelofavailablecapacityandinventory.
Answer:
True
Difficulty:
Moderate
4.Forpushprocesses,amanagermustforecastwhatcustomerdemandwillbeinordertoplanthelevelofavailablecapacityandinventory.
Answer:
False
Difficulty:
Hard
Theresultingforecastaccuracyenablessupplychainstobebothmoreresponsiveandmoreefficientinservingtheircustomers.
5.Theresultwheneachstageinthesupplychainmakesitsownseparateforecastisoftenamatchbetweensupplyanddemand,becausetheseforecastsareoftenverydifferent.
Answer:
False
Difficulty:
Moderate
6.Whenallstagesofasupplychainproduceacollaborativeforecast,ittendstobemuchmoreaccurate.
Answer:
True
Difficulty:
Easy
7.Leadersinmanysupplychainshavestartedmovingtowardcollaborativeforecastingtoimprovetheirabilitytomatchsupplyanddemand.
Answer:
True
Difficulty:
Moderate
8.Matureproductswithstabledemandareusuallythemostdifficulttoforecast.
Answer:
False
Difficulty:
Moderate
9.Forecastingandtheaccompanyingmanagerialdecisionsareextremelydifficultwheneitherthesupplyofrawmaterialsorthedemandforthefinishedproductishighlyvariable.
Answer:
True
Difficulty:
Easy
10.Forecastsarealwaysright.
Answer:
False
Difficulty:
Easy
11.Forecastsshouldincludeboththeexpectedvalueoftheforecastandameasureofforecasterror.
Answer:
True
Difficulty:
Moderate
12.Long-termforecastsareusuallymoreaccuratethanshort-termforecasts.
Answer:
False
Difficulty:
Moderate
13.Aggregateforecastsareusuallymoreaccuratethandisaggregateforecasts,astheytendtohaveasmallerstandarddeviationoferrorrelativetothemean.
Answer:
True
Difficulty:
Moderate
14.Ingeneral,thefurtherupthesupplychainacompanyis(orthefurthertheyarefromtheconsumer),thesmallerthedistortionofinformationtheyreceive.
Answer:
False
Difficulty:
Easy
15.Collaborativeforecastingbasedonsalestotheendcustomercanhelpenterprisesfurtherupthesupplychainreduceforecasterror.
Answer:
True
Difficulty:
Moderate
16.Qualitativeforecastingmethodsaremostappropriatewhenthereisgoodhistoricaldataavailableorwhenexpertsdonothavemarketintelligencethatiscriticalinmakingtheforecast.
Answer:
False
Difficulty:
Moderate
17.Timeseriesforecastingmethodsarebasedontheassumptionthatpastdemandhistoryisagoodindicatoroffuturedemand.
Answer:
True
Difficulty:
Easy
18.Timeseriesforecastingmethodsarethemostdifficultmethodstoimplement.
Answer:
False
Difficulty:
Moderate
19.Causalforecastingmethodsfindacorrelationbetweendemandandenvironmentalfactorsanduseestimatesofwhatenvironmentalfactorswillbetoforecastfuturedemand.
Answer:
True
Difficulty:
Moderate
20.Simulationforecastingmethodsimitatetheconsumerchoicesthatgiverisetodemandtoarriveataforecast.
Answer:
True
Difficulty:
Moderate
21.Theobjectiveofforecastingistofilterouttherandomcomponent(noise)andestimatethesystematiccomponent.
Answer:
True
Difficulty:
Moderate
22.Theforecasterrormeasuresthedifferencebetweentheforecastandtheestimate.
Answer:
False
Difficulty:
Easy
23.Thegoalofanyforecastingmethodistopredictthesystematiccomponentofdemandandestimatetherandomcomponent.
Answer:
True
Difficulty:
Moderate
24.Astaticmethodofforecastingassumesthattheestimatesoflevel,trend,andseasonalitywithinthesystematiccomponentvaryasnewdemandisobserved.
Answer:
False
Difficulty:
Easy
25.Inadaptiveforecasting,theestimatesoflevel,trend,andseasonalityareupdatedaftereachdemandobservation.
Answer:
True
Difficulty:
Moderate
26.Themovingaverageforecastmethodisusedwhendemandhasanobservabletrendorseasonality.
Answer:
False
Difficulty:
Moderate
MultipleChoice
1.Thebasisforallstrategicandplanningdecisionsinasupplychaincomesfrom
a.theforecastofdemand.
b.salestargets.
c.profitabilityprojections.
d.productionefficiencygoals.
e.alloftheabove
Answer:
a
Difficulty:
Easy
2.Forpushprocesses,amanagermustforecastwhatcustomerdemandwillbeinorderto
a.plantheservicelevel.
b.planthelevelofavailablecapacityandinventory.
c.planthelevelofproductivity.
d.planthelevelofproduction.
e.noneoftheabove
Answer:
d
Difficulty:
Moderate
3.Forpullprocesses,amanagermustforecastwhatcustomerdemandwillbeinorderto
a.plantheservicelevel.
b.planthelevelofavailablecapacityandinventory.
c.planthelevelofproductivity.
d.planthelevelofproduction.
e.noneoftheabove
Answer:
b
Difficulty:
Moderate
4.Theresultofeachstageinthesupplychainmakingitsownseparateforecastis
a.anaccurateforecast.
b.amoreaccurateforecast.
c.amatchbetweensupplyanddemand.
d.amismatchbetweensupplyanddemand.
e.noneoftheabove
Answer:
d
Difficulty:
Moderate
5.Whenallstagesofasupplychainproduceacollaborativeforecast,ittendstobe
a.muchmoredetailed.
b.muchmorecomplex.
c.muchmoreaccurate.
d.muchmoreflexible.
e.alloftheabove
Answer:
c
Difficulty:
Moderate
6.Theresultingaccuracyofacollaborativeforecastenablessupplychainstobe
a.moreresponsivebutlessefficientinservingtheircustomers.
b.bothmoreresponsiveandmoreefficientinservingtheircustomers.
c.lessresponsivebutlessefficientinservingtheircustomers.
d.bothlessresponsiveandlessefficientinservingtheircustomers.
e.Noneoftheabovearetrue.
Answer:
b
Difficulty:
Moderate
7.Leadersinmanysupplychainshavestartedmoving
a.towardindependentforecastingtoimprovetheirabilitytomatchsupplyanddemand.
b.towardconsecutiveforecastingtoimprovetheirabilitytomatchsupplyanddemand.
c.towardsequentialforecastingtoimprovetheirabilitytomatchsupplyanddemand.
d.towardcollaborativeforecastingtoimprovetheirabilitytomatchsupplyanddemand.
e.Noneoftheabovearetrue.
Answer:
d
Difficulty:
Moderate
8.Productioncanutilizeforecaststomakedecisionsconcerning
a.scheduling.
b.sales-forceallocation.
c.promotions.
d.newproductintroduction.
e.budgetaryplanning.
Answer:
a
Difficulty:
Moderate
9.Marketingcanutilizeforecaststomakedecisionsconcerning
a.scheduling.
b.promotions.
c.inventorycontrol.
d.aggregateplanning.
e.purchasing.
Answer:
b
Difficulty:
easy
10.Financecanutilizeforecaststomakedecisionsconcerning
a.scheduling.
b.promotions.
c.plant/equipmentinvestment.
d.aggregateplanning.
e.purchasing.
Answer:
a
Difficulty:
Moderate
11.Personnelcanutilizeforecaststomakedecisionsconcerning
a.scheduling.
b.promotions.
c.plant/equipmentinvestment.
d.workforceplanning.
e.purchasing.
Answer:
b
Difficulty:
Moderate
12.Matureproductswithstabledemand
a.areusuallyeasiesttoforecast.
b.areusuallyhardesttoforecast.
c.cannotbeforecast.
d.donotneedtobeforecast.
e.noneoftheabove
Answer:
a
Difficulty:
Easy
13.Wheneitherthesupplyofrawmaterialsorthedemandforthefinishedproductishighlyvariable,forecastingandtheaccompanyingmanagerialdecisions
a.areextremelysimple.
b.arerelativelystraightforward.
c.areextremelydifficult.
d.shouldnotbeattempted.
e.noneoftheabove
Answer:
c
Difficulty:
Easy
14.Oneofthecharacteristicsofforecastsis
a.forecastsarealwaysright.
b.forecastsarealwayswrong.
c.short-termforecastsareusuallylessaccuratethanlong-termforecasts.
d.long-termforecastsareusuallymoreaccuratethanshort-termforecasts.
e.noneoftheabove
Answer:
b
Difficulty:
Moderate
15.Oneofthecharacteristicsofforecastsis
a.aggregateforecastsareusuallylessaccuratethandisaggregateforecasts.
b.disaggregateforecastsareusuallymoreaccuratethanaggregateforecasts.
c.short-termforecastsareusuallylessaccuratethanlong-termforecasts.
d.long-termforecastsareusuallylessaccuratethanshort-termforecasts.
e.noneoftheabove
Answer:
d
Difficulty:
Moderate
16.Oneofthecharacteristicsofforecastsis
a.aggregateforecastsareusuallymoreaccuratethandisaggregateforecasts.
b.disaggregateforecastsareusuallymoreaccuratethanaggregateforecasts.
c.short-termforecastsareusuallylessaccuratethanlong-termforecasts.
d.long-termforecastsareusuallymoreaccuratethanshort-termforecasts.
e.noneoftheabove
Answer:
a
Difficulty:
Moderate
17.Forecastsarealwayswrongandtherefore
a.shouldincludeboththeexpectedvalueoftheforecastandameasureofforecasterror.
b.shouldnotincludeboththeexpectedvalueoftheforecastandameasureofforecasterror.
c.shouldonlybeusedwhentherearenoaccurateestimates.
d.shouldbemissingtheexpectedvalueoftheforecastandameasureofforecasterror.
e.noneoftheabove
Answer:
a
Difficulty:
Easy
18.Long-termforecastsareusuallylessaccuratethanshort-termforecastsbecause
a.short-termforecastshavealargerstandarddeviationoferrorrelativetothemeanthanlong-termforecasts.
b.short-termforecastshavemorestandarddeviationoferrorrelativetothemeanthanlong-termforecasts.
c.long-termforecastshaveasmallerstandarddeviationoferrorrelativetothemeanthanshort-termforecasts.
d.long-termforecastshavealarger
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