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Unformatted text preview: Home > My courses > John Molson School of Business > Commerce t COMM 225 2013M EJ > Topic 13 b Quiz 4 A Started on State Completed on Time token Marts Grade Quiz navigation WE E E quesllnll 1 Correct Mark I on out Di LDD EWMM NEE @EH E Show one page at a time Finish rewew Friday. 28 March 2014. 7:05 PM Finished Friday. 28 March 2014. 7:25 PM 20 mins 23 DOES DD 145 out of 3 75 (91%) A walksin medical clinic has four doctors that serve patients with health problems on a ﬁrstscome. ﬁrstsserve basis. On average a doctor requires 15 minutes to process a patient and service times follow an exponential distribution, Patients arrive at the clinic allhe rate of ll] per hour according to a Poisson distribution The probability that there is no patient in the medical clinic is U 073. The average number of patients waiting to be sewed would be (approximately) Select one D a. n 30 Dose 0 c None of the choices are correct Danes Eleoss The correct answer is D 53 Question 2 A multiple server system has customers arriVing at an average rate of ﬁve per hour and an average service time of forty minutes. The CW“ minimum number of servers for this system to be underloaded is Ts: ‘ DD WI D. Select one Elan question D 3* 5 [a b. 4 D c none of these [1 d. 3 D e. 2 I O I Question 3 Airplanes arrive at gate no 12 ota busy 6lean Aﬁer being parked in the right position, the passengers’ baggage gets unloaded by a A CW“ team of baggage handlers. There is space for one airplane at the gate, and an unlimited space on the runaway for planes to wait for M m ' DD ' unloading The arrival of planes follows a Poisson process with rate oft every hour. The unloading time of a plane is exponentially LSD ' mm D distributed, with rate proportional to the number ofbaggage handlers in the unloading crew. Each baggage handler can unload half of the plane in an hour. The manager has currently assigned 3 baggage handlers for unloading a plane. Which of the tollowmg is the 3'“ “95”” eﬁect of increasing the number of baggage handlers? Select one m”! "mimm’" D a. Average utilization will increase. 0 b. Average number of planes waiting to be unloaded Wlll increase. [a c Probability that the server is idle Wlll increase 0 d. All the given choices are true 0 e. Average time a plane must wait in the system will increase SHOW 0'19 D399 313 lime The correct answer is: Probability mat the server is idle Will increase Finish rewew Question 4 Which ofthe tollowmg is Lot a disadvantage of a loll'tt line? Correct Mark LDD out ot salen one I W D a. It might appear too long for customers Elsi! “WSW” D b. It may take a large space E c lt increases average wait time for homogeneous customers. 0 d. Sewers may not work as last. 0 e. Customers can't choose their favourite server The correct answer is. It increases average wait time for homogeneous customers. Question 5 The number of parailei sewers in waiting line analysis is referred to as the number of phases Correct Mark LDD out ot salen one V IDEI D True Question 5 Correct Mark LDD out ot I no [on not.“ null navigation m a «mm 6 Correct EE MarleDoutot E LDD Show one page at a time “lag question Finish review Questmn 7 Correct Mark I DDouit nt LEM} ﬂog question The number of parallet servers in waiting line analysis is referred to as the number of phases. Select one D True E False The correct answer is 'False‘ For inﬁnite source models: which atthe following wlll equal the average time a customer is In the system? |. average number in the system diVided by the arrival rate It. average number ll'l the system multiplied by the arrival rate Ill. average time in line plus average service time Select one D a. II and lll E] b. land Ill 0 c ll| only [1 d. lonty D e. It only The correct answer is: land I” Customers arrive at a teller ot a bank at the rate of t4 every haltan hour according to a Poisson distribution. Service times are exponentially distribuled with a service rate of 35 customers per hour. If the arrival rate remains at 14 customers every half hour and the bank manager wants to have the average time a customer spends in the system to be a maximum 016 minutes on average, then the service rate must Select one Q a. increase by 3 to 38 cumomers per hour 0 b. none otthe given choices Gueslloll 7 Correct Mark I [Went ot LDl} are who" Quiz navigation Show one page at a time Finish review Questinn 3 lncorrect Mark D on out at LED 3...; was" Question 9 Correct M rktDDoutnt Customers arrive at a teller ot a bank at the rate of 14 every haltan hour according to a Poisson distribution. Service times are exponentially distributed with a service rate of 35 customers per hour. It the anival rate remains at 14 customers every half hour and the bank manager wants to have the average time a customer spends in the system to be a maximum of 6 minutes on average, then the service rate must Select one [a a. increase by 3 to 38 customers per hour D b. none ofthe given choices 0 c decrease by 8 to 27 customers per hour D d. decrease by 1D to 25 customers per hour D e. decrease by 7 to 28 customers per hour The correct answer is: increase by 3 to 36 customers per hour Customers arrive at a teller ot a bank at the rate of 14 every halfan hour according to a Poisson distribmion. Service times are exponentially distributed with a service rate of 35 cumomers per hour. The probability that there are more than 2 cuﬁomers in the system is Select one D a. u 433 [a b. 0.540 X D c 0.123 D d. none ofthe given choices D e. u 512 The correct answer is: l] 512 A single sewer queuing system has an average service time of 16 minutes per customer, which is Hponentially distributed The manager is ﬂ'iinking of converting to a system With a constant service time of 16 minutes. The average arrival rate Wlll remain the same. The eﬁect Wlll be to: Quiz navigation WE E E NEE @EH E Show one page at a time Finish review Question 9 Correct Mark 1 on out ot IDD imam Question 10 Correct Mark I DD out ot LDD ﬂag question Question 11 Current Mark LDDout ot LDD mwm A single server queuing system has an average service time of 16 minmes per customer, which is exponentially distributed. The manager is thinking pfconvei‘ling to a system With a constant service time of 16 minutes. The average anival rate Will remain the same. The effect Will be to: Select one Q a. decrease the average waiting time D b. decrease utilization D c not have any eﬁect since the service time is unchanged 0 d. increase the average waiting time D e. increase utilization The correct answer is: decrease the average waiting time Which ot the tollowmg is Lat generally considered as a measure of system performance in a queuing analysis? Select one Q a. the average service time . D b. the probability that an arriving customer will have to wait for sewice D c the average number in the system C] d. the average number waiting in line D e. server utilization The correct answer is: the average service time A walk-in medical clinic has four doctors that serve patients with health problems on a ﬁrst-come. ﬁrst-serve basis. On average a doctor requires 15 minutes to process a patient and service times follow an exponential distribution. Patients arrive at the clinic atthe rate of 10 per hour according to a Poisson distribution The probability that there is no patient in the medicat clinic is U 073. The probability that there are exactly three patients in the system is (approximately) Select one D a. D 927 Quiz navigation Show one page at a time Finish review Question 11 Current Mark LDDout ot LDD mwm Question 12 Correct Mark t.DDoi.n oi IDD Eran question Question 13 Correct Mark t.DDoi.n oi IDD A walk-in medical clinic has four doctors that serve patients with health problems on a ﬁrst-come. ﬁrst-serve basis. On average a doctor requires 15 minutes to process a patient and service times follow an exponential distribution. Patients arrive at the clinic atthe rate of 10 per hour according to a Poisson distribution The probability that there is no patient in the medicat clinic is U 073. The probability that there are exactly three patients in the system is (approximately) Select one D a. D 927 D b. None ofthe given choices are true I] c 0.023 E] d. n 19 D e. u 5 The correct answer is' D 19 A basic dit‘ference between inﬁnite source and ﬁnite source queuing models is Select one D a. the average arrival rate 0 b. the number ofservers E c size of potential calling population D d. the average waiting time D e. service rate The correct answer is' size of potential calling population A walkein medical clinic has four doctors that serve patients with health problems on a ﬁrstecome. ﬁrsteserve basis. On average a doctor requires 15 minutes to process a patient and service times follow an exponential distribution. Patiean arrive at the clinic atthe rate of 10 per hour according to a Poisson distribution The probabiiity that there is no patient in the medical clinic is U 073. The probability that an arriving patient must wait for service is (approximately) The correct answer is: size of potentiai caliing popuialion Questinn 13 A walk-in medical cl has four doctors that serve patients with health problems on a ﬁrst-come. ﬁrst-serve basis. On average a ch doctor requires 15 minutes to process a patient and service times foliow an exponentiai distribution. Patients arrive at the ciinic atthe rate of 10 per hour according to a Poisson distribution The probability that there Is no patient in the medicai clinic is U 073 The "5* "DD wt D. probability that an arriving patient must wait for service is (approximateiy) V V 7 Lou Quiz navigation E's“ “Em” Seiect one Elm Elam DaliJD Ellil El Dense EHEIEI On 0927 E D d. None oithe choices are correct Show one page at a time [a E. U 31 Finish review The correct answer is: D 31 Question 14 A walk-in medical cl has four doctors that serve patients with health problems on a ﬁrst-come. ﬁrst-serve basis. On average a doctor requires 15 minutes to process a patient and service times foliow an exponentiai distribution. Patients arrive at the ciinic atthe rate of 10 per hour according to a Poisson distribution The probability that there Is no patient in the medical clinic is U 073 On 1'13: "DD m M average, the total number of patients in the system (i e. waiting and being served) would be (approximately) Correct Elan “aim” Seiect one D a. None oithe choices are true 0 b. u 3i: [1 c 0.50 Dd.005 (assoc. The correcl answer is: 3 OD The correct answer is: 3 00 Gueslimr 15 Which ofthe loilowing is a consequence at increasing the number of servers in a waiting iine system? Correct Mark LDD out at seiem one a _ _ ﬂ ' D” D a. both service cost and waiting cost increase uiz navrga on ['39 “Em” C b. both service cost and waiting cost decrease E E E E E D c service cost decreases, waiting cost increases, and waiting cost decrwses [a d. sewice cost increases, waning time decreases, and waiting cost decreases. . EIEIEI is D M 7 h e. none e given c oices E E E E The correct answer is: senrice cost increases, waiting time decreases, and waiting cost decreases. Show one page at a time Finish review Question 15 Airplanes arrive at gate no 12 ota busy airporL Alter being parked in the right position, the passengers” baggage gets unloaded by a CM.“ team of baggage handlers. There is space for one airpiane at the gate, and an unlimited space on the runaway for planes to wait for unloading The anival of planes foilows a Poisson process with rate of! every hour The unloading time of a plane is exponentially :13: "DD m M distributed, with rate proportional to the number of baggage handiers in ﬁre unioading crew. Each baggage handier can unioad half of the plane in an hour. The manager has currently assigned 3 baggage handiers tor unloading a plane. The probability that the gate is [Isa wet-on busy and the plane has to wait for unloading is (approximateiyj Seiect one Q] a. D 65 CI b.DED D c 0.33 D d. None ofthe given choices 0 e. 1 on The correct answer is: D 65 Quiz navigation WE E E NEE @EH E Show one page at a time Finish reitiew Question 17 lncorrect Mark U.Dl] out at I no [mew Question 13 Correct Mark I no out at LDD ﬂag question Question 19 Correct Mark I on out Di too The correct answer is: D 65 A single server queuing system has an average service time of 8 minutes and an average time between anivaEs of 7.5 minutes. The average arrival rate is: Select one D a. 6 per hour 0 b. 11} per hour E c. 7.5 palinur X D d. 12.5 per hour 0 e. 3 per hour The correct answer is: 3 per hour Buying a ticket for a college football game, where there are multiple windows to buy the ticket and where customers form a singEe queue. features which type of line structure in a queuing system? Select one D a. None ofthe above D b. Single channel multiphase D c Single channet, single phase 0 d. Multichannel, multrphase [a e. Multichannel, single phase The correct answer is: Multichannel, single phase Airplanes arrive at gate no l2 ofa busy airport Aﬁer being parked in the right position, the passengers” baggage gets unloaded by a learn of baggage handlers. There is space for one airplane at the gate, and an unlimited space on the runaway for planes to wait for unloading The anival of planes follows a Poisson process with rate oft every hour The unloading time of a plane is exponentially distributed, with rate proportional to the number ofbaggage handlers in the unloading crew. Each baggage handler can unload half of V u...-- i. -i . Quiz navigation Show one page at a time Finish reitiew Quasiinn 19 Correct Mark LDDout ol Loo ﬂag quests" Quasiinn 20 Correct Mark LDD out Di ioo imam The correct answer is' Multichannel, single phase Airplanes arrive at gate no l2 ota busy airport. Aﬂer being parked in the right position, the passengers’ baggage gets unloaded by a learn of baggage handlers. There is space for one airplane at the gate, and an unlimited space on the runaway for planes to wait for unloading The arrival of planes follows a Poisson process with rate oft every hour. The unloading time of a plane is exponentially distributed, with rate proportional to the number ofbaggage handlers in the unloading crew. Each baggage handler can unload half of the plane in an hour The manager has currently assigned 3 baggage handlers for unloading a plane The average number of planes waiting to be unloaded is (approximately) Select one D a. t 94 Demo Dollﬁﬁ Germ D e. None nfthe given choices The correct answer is' 1 33 Airplanes arrive at gate no l2 ota busy airport Aﬂer being parked in the right position, the passengers’ baggage gets unloaded by a learn of baggage handlers. There is space for one airplane at the gate, and an unlimited space on the runaway for planes to wait for unloading The anival of planes follows a Poisson process with rate oft every hour. The unloading time of a plane is exponentially distributed, with rate proportional to the number ofbaggage handlers in the unloading crew. Each baggage handler can unload half of the plane in an hour The manager has currently assigned 3 baggage handlers for unloading a plane The average time a plane spends in the system is (approximately) Select one D a. 1 OD hr 0 b.12l3hrs D c 0.56 hrs E] d.2hrs D e. None nfthe given choices me—currenarrsweI—Is. nrs A Question 21 Airplanes arrive at gate no 12 ota busy airport. After being parked in the right position, the passengers’ baggage gets unloaded by a Cnmm team of baggage handlers. There is space for one airplane at the gate, and an unlimited space on the runaway for planes to wait for M m ‘ W m ' unloading The arrival of planes follows a Poisson process with rate oft every hour. The unloading time ofa plane is exponentially LSD ' a '7 distributed, with rate proportional to the number ofbaggage handlers in ﬂ'Ie unloading crew. Each baggage handler can unload half of the plane in an hour The manager has currently assigned 3 baggage handiers for unloading a plane The average time a plane must n'aﬁ “95"” wait before being unloaded is (approximately) Quiz navigation Select one m E E D a. None otthe given choices E b. 1 33 hrs _ EIEI El 0 m c . rs El El El El [1 d. n 65 hrs Show one page at a time D e' 1 DD l“ Finish retriew The correct answer Is: 1 33 hrs Queinnn 22 A walkein medical clinic has tour doctors that serve patients with health problems on a ﬁrstecome. ﬁrsteserve basis. On average a CW“ doctor requires t5 minutes to process a patient and service times follow an exponential distribution. Patiean arrive at the clinic atthe rate of ll] per hour according to a Poisson distribution The probability that there is no patient in the medical! clinic is U 073. The MsrkLDDout ot . . . . . mu average amount ottime. in minutes, spent by a patient wading In line t5 approximately (two places ofdecImal) “'39 “all” Select one D a. 1‘3 minutes E b. 3 OD minutes 0 c 0.03 minutes 0 d. None otthe given choices are true D e. D 05 minutes The correct answer Is: 3 00 minutes V m hftps‘i/lrnﬂUdle.(oncerdia.ca.‘rnoodiEfmodiguizfreviewiphp?attempt:4?2829&showail=l 'm Quiza D e. D 05 minutes A The correct answer is' 3 00 minutes Question 23 As the ratio of anival rate to service rate is Increased, which of the followmg is likely? Correct Select one . . . MarktDDput Dl QUIZ “VIDEO” ID” D a. Utilization is decreased because of the added strain on the system m E E E E than “5"” D b. The average number in the system decreases. D c None of these will occur Em E @dC h hh llbe 'l d IE E E E . uslomers move t roug t e system more s ow y cause ulI izatIon Is Increase E I D e. Customers move through the system in less time because utilization is increased. Show me page at a lime The correct answer Is: Customers move through the system more slowly because utilization is increased. Finish retriew Question 24 A walkein medical clinic has four doctors that serve patients with health problems on a ﬁrstecome. ﬁrsteserve basis. On average a CW“ doctor requires 15 mInutes to process a patient and service times follow an exponential distribution. Patiean arrive at the Bill'ilc atthe rate of ll] per hour according to a Poisson distribution The probability that there is no patient in the medical clinic is D 073 The Mark LDD out Dl . . mu average amount ottime. in minutes, spent by a patient In the system would be (up to two places ofdecimal) El“ “"25"” Select one D a. None otthe given choices are correct 0 b. D 5 minutes 0 c 0.03 minutes D d. 3 minutes E e. 16.00 minums The correct answer Is: 13.0!) minutes V Queens" 25 A company has hired you to analyze its waiting line system They want to set up a new service desk and need to know on average mt m LDD [.39 mm Quiz navigation EIIZIEIEIEIEI EIIEIIEI El EIIEIIEI Gummzs E Comet Show one page at a time um um nut Di LDD an“ question Finreh rewew Finish review Tnoodlc Setect one D 3. None ofthe given choices are correct D b. D 5 mrnules D c 0.03 minutes D d, 3 minutes 5] e, 16,00 minutes ‘ The correct answer Is: 13.0!) minutes A company has hired you to analyze its wailrng \ine system They want to set up a new service desk and need to know on average haw many customers WIH he in the system?| It we believed that customers wiH arrive at the rate of nne every 15 rmnutes Asenlice rep can handle 7 customers per hour, Uee the average amount of trme‘ m minutes, spent by a patient in the system would be (up to two places of decrmal). irrﬁnrte queuing notalrans and assume Pmsson arrwai rate and Exponentiai service time, Setect one [a a. 1 33 . [111145 Dc 1,00 [L115 0&125 The correct answer is: 1 33 You are logged in as E ...
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