bozhantifch08S.docx

bozhantifch08S.docx

《bozhantifch08S.docx》由会员分享，可在线阅读，更多相关《bozhantifch08S.docx（14页珍藏版）》请在冰豆网上搜索。

bozhantifch08S

Chapter8SAdvancedWaitingLineTheoryandSimulationModeling

TRUE/FALSE

1.Inwaitinglinetheory,thenumberofchannelsreferstothenumberofcustomerwaitinglinesinthesystem.

Answer:

True

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

channel,waitingline

2.Inmostwaitinglinemodels,customersareassumedtoarriveatrandomintervals,basedonanormaldistribution.

Answer:

False

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

arrival,interarrival,Poisson

3.TheGreekletterlambda（λ）isusedtorepresenttheservicerateofawaitinglinesystem.

Answer:

False

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

waitingline,arrival,service

4.Awaitinglinecannotbebothmultiple-channelandmultiple-phase.

Answer:

False

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

channel,phase

5.Allwaitinglineformulasassumethatcustomersareservedonafirst-comefirst-served（FCFS）basis.

Answer:

True

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

FCFS,queue,discipline

6.WithonlyahalfhourforlunchIscreamedintotheparkinglotofthenearestGoldenArchesSupperClubat40milesanhour.WhenIsawthedrivethroughlinewas15carsdeepIdidn’tbothergettinginline;IwasofftovisittheColonel.Thisbehaviormightbedescribedasbalking.

Answer:

True

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

balk

7.EverythingabouttwodifferentwaitinglinesystemsisthesameexceptonesystemhasaconstantservicetimeandtheotherhasaPoissondistributedservicetime.CustomersusingthesystemwiththeconstantservicetimewillhavehalfthewaitingtimeofthecustomersusingthesystemwithPoissondistributedservicetimes.

Answer:

True

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

channel,multiplechannel.

AACSB:

AnalyticSkills

8.Theterm“timecompression”referstothephenomenonthataservertendstospeeduptheserviceprocessifthewaitinglineexceedssomecriticalnumberofcustomers.

Answer:

False

Reference:

SimulationModeling

Difficulty:

Easy

Keywords:

simulation,timecompression

9.Itismorecostlytocreateamorerealisticsimulationthanonethatislessrealistic.

Answer:

True

Reference:

SimulationModeling

Difficulty:

Easy

Keywords:

simulation,realistic

10.MonteCarlosimulationusesstatisticalsamplingtocreateoutcomesforalargenumberoftrials.

Answer:

True

Reference:

SimulationModeling

Difficulty:

Moderate

Keywords:

MonteCarlo,simulation

11.Inmostcases,simulationmodelsprovideoptimalsolutionstoproblemsjustlikemostoftheequationspresentedinyourtextbook.

Answer:

False

Reference:

SimulationModeling

Difficulty:

Moderate

Keywords:

simulation,optimal

MULTIPLECHOICE

12.Acustomerentersabusinessandhastheopportunitytoselectanyoneofthreelinestoreceiveservice.Theserviceisperformedbyonecustomerservicerepresentativeafterwhichthecustomerleavestheestablishment.Whichdescriptionofthiswaitinglinesystemisappropriate?

a.singlechannel,singlephase

b.singlechannel,multiplephase

c.multiplechannel,singlephase

d.multiplechannel,multiplephase

Answer:

c

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

channel,phase,waitingline

13.Acustomerentersabusinessandjoinstheonelinethatsnakesbackandforththroughthelobbyinordertoreceiveservice.Theinitialpartoftheserviceisperformedbyonecustomerservicerepresentative,afterwhichthecustomerentersasecond,shorterlinetocompletetheservicebeforeleavingtheestablishment.Whichdescriptionofthiswaitinglinesystemisappropriate?

a.singlechannel,singlephase

b.singlechannel,multiplephase

c.multiplechannel,singlephase

d.multiplechannel,multiplephase

Answer:

b

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

channel,phase,waitingline

14.Customerarrivalsatadrycleaningserviceoccurrandomlythroughouttheday.thedistributionthatisusuallyusedtomodeltheintervalbetweenarrivalsisthe:

a.Poissondistribution.

b.uniformdistribution

c.randomdistribution

d.normaldistribution

Answer:

a

Reference:

AlternativeWaitingLines

Difficulty:

Easy

Keywords:

arrival,Poisson

15.Thedepartmentchairisoutoftownataconferenceandyou,astheassistantdepartmentchair,findyourselfbesiegedbydozensofstudentsneedingpermissiontogetintoaverypopular（butclosed）class.StudentarrivalsaregovernedbythePoissondistributionwithameanof10minutes.Tellingthestudentsthattheycan’tgetintotheclosedclasstakesabout3minutes,andthisaverageisexponentiallydistributed.Abouthowmanystudentsarewaitingoutsideyourofficedoor?

a.0.13students

b.0.43students

c.1.25students

d.2.25students

Answer:

a

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

waiting,singlechannel,singlephase

AACSB:

AnalyticSkills

16.Thedepartmentchairisoutoftownataconferenceandyou,astheassistantdepartmentchair,findyourselfbesiegedbydozensofstudentsneedingpermissiontogetintoaverypopular（butclosed）class.StudentarrivalsaregovernedbythePoissondistributionwithameanof10minutes.Tellingthestudentsthattheycan’tgetintotheclosedclasstakesabout5minutes,andthisaverageisexponentiallydistributed.Abouthowlongdostudentswaitoutsideyourofficedoor?

a.0.083minutes

b.0.083hours

c.0.50minutes

d.0.50hours

Answer:

b

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

waiting,singlechannel,singlephase

AACSB:

AnalyticSkills

17.Thedepartmentchairisoutoftownataconferenceandyou,astheassistantdepartmentchair,findyourselfbesiegedbydozensofstudentsneedingpermissiontogetintoaverypopular（butclosed）class.StudentarrivalsaregovernedbythePoissondistributionwithameanof5minutes.Tellingthestudentsthattheycan’tgetintotheclosedclasstakesabout3minutes,andthisaverageisexponentiallydistributed.Abouthowmanystudentsarewaitingoutsideyourofficedoorandinyouroffice?

a.0.5

b.1.0

c.1.5

d.2.0

Answer:

c

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

waiting,singlechannel,singlephase

AACSB:

AnalyticSkills

18.Thedepartmentchairisoutoftownataconferenceandyou,astheassistantdepartmentchair,findyourselfbesiegedbydozensofstudentsneedingpermissiontogetintoaverypopular（butclosed）class.StudentarrivalsaregovernedbythePoissondistributionwithameanof5minutes.Tellingthestudentsthattheycan’tgetintotheclosedclasstakesabout3minutes,andthisaverageisexponentiallydistributed.Abouthowlongdoesittakeastudenttowaitinlineandreceiveyourvaluableservice?

a.0.125minutes

b.0.075hours

c.4.5minutes

d.7.5minutes

Answer:

d

Reference:

AlternativeWaitingLines

Difficulty:

Moderate

Keywords:

waiting,singlechannel,singlephase,system

AACSB:

AnalyticSkills

19.ThebankmanagerofabusydowntownlocationfoundherselfunabletofindgoodtellerhelpsosheinvestedinanATMtohandletheroutinewithdrawalsthattendedtooccupyaninordinateamounttheteller’stime.BeforesheinstalledtheATMshefoundthatcustomerswerearrivingonaverageevery2minutes（Poissondistributed）andittookateller30seconds（exponentiallydistributed）toprocesstheirrequest.TheATMisabletomaintainaconstant30secondservicetime.Whatistheimpactonsystemutilization?

a.Thereisnochange.

b.Utilizationhasdroppedby15%.

c.Utilizationhasdroppedby30%.

d.Utilizationhasdroppedby45%.

Answer:

a

Reference:

AlternativeWaitingLines

Difficulty:

Difficult

Keywords:

waiting,singlechannel,utilization

AACSB:

AnalyticSkills

20.ThebankmanagerofabusydowntownlocationfoundherselfunabletofindgoodtellerhelpsosheinvestedinanATMtohandletheroutinewithdrawalsthattendedtooccupyaninordinateamounttheteller’stime.BeforesheinstalledtheATMshefoundthatcustomerswerearrivingonaverageevery2minutes（Poissondistributed）andittookateller30seconds（exponentiallydistributed）toprocesstheirrequest.TheATMisabletomaintainaconstant30secondservicetime.Whatistheimpactonthenumberofcustomerswaitinginline?

a.Thereisnochange.

b.TheATMlineishalfaslongasthetellerline.

c.TheATMlineistwiceaslongasthetellerline.

d.TheATMlineis25%shorterthanthetellerline.

Answer:

b

Reference:

AlternativeWaitingLines

Difficulty:

Difficult

Keywords:

waiting,singlechannel,utilization

AACSB:

AnalyticSkills

21.ThebankmanagerofabusydowntownlocationfoundherselfunabletofindgoodtellerhelpsosheinvestedinanATMtohandletheroutinewithdrawalsthattendedtooccupyaninordinateamounttheteller’stime.BeforesheinstalledtheATMshefoundthatcustomerswerearrivingonaverageevery60seconds（Poissondistributed）andittookateller20seconds（exponentiallydistributed）toprocesstheirrequest.TheATMisabletomaintainaconstant30secondservicetime.Whatistheimpactonthewaitingtimeforthecustomers?

a.Thereisnochange.

b.ThewaitintheATMlineis50%shorterthanthewaitinthetellerline.

c.ThewaitintheATMlineis50%higherthanthewaitinthetellerline.

d.ThewaitintheATMlineis25%shorterthanthetellerline.

Answer:

c

Reference:

AlternativeWaitingLines

Difficulty:

Difficult

Keywords:

waiting,singlechannel,utilization

AACSB:

AnalyticSkills

22.Oneadvantageofsimulationmodelingis:

a.itallowstheusertoconducta“whatif”analysis