Question: 3. (2 points) Use queueing theory. National Bank is trying to decide how many drive-in teller windows to open on a busy Saturday. Manager Tod

3. (2 points) Use queueing theory. National Bank

3. (2 points) Use queueing theory. National Bank is trying to decide how many drive-in teller windows to open on a busy Saturday. Manager Tod Eschenbach estimates that customers arrive at a rate of 1 = 18 per hour and that each teller can service u = 20 customers per hour. a. What is the optimum number of teller window(s) to open if the manager wants average number of customers in line is less than 0.005 customers? [Use table D.5] b. What is the average waiting time in the queue for the above optimum scenario (in minutes)? 20111 .0264 0008 .0500 0020 _0833 0039 11285 0069 1884 0110 2666 0166 0239 .0019 3681 .5000 0333 .0030 6722 0449 -0043 9000 1.2071 .0593 0767 0976 1.6333 .0061 .0084 .0112 .0147 .0189 2.2500 -1227 3.2000 . 1523 4.8166 .0239 8. 1000 1873 .2285 2767 3333 .0300 .0371 18.0500 0454 0031 0041 0053 ,0067 .0158 .0324 .0604 .6748 .0904 1.3449 -1778 .3128 2.8444 7.6734 .0059 .0121 0227 0398 5320 -1051 .8888 11739 N 1.4907 2770 .0659 N 2.1261 4305 61047 -1609 N 4.9322 6581 N 12.2724 1.0000 .2411 M 1.5282 3541 M 2.3856 .5128 M 3.9060 .7365 M 7.0893 1.0550 M 16.9366 1.5184 2.2164 3.3269 5.2675 9.2885 21.6384

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