bozhantifch08S.docx
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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
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