Chapter 13

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1.	(a) multiple server, FCFS, finite or infinite; (b) multiple server, FCFS, infinite; (c) multiple server, FCFS, infinite; (d) single or multiple, appt., finite; (e) single server, FCFS or appt., finite; (f) single server, FCFS, finite; (g) multiple server, FCFS, infinite; (h) single or multiple, FCFS, infinite; (i) single server, FCFS or appt., finite
3.	(a) false; (b) true
5.	Customers served according to a schedule or alphabetically , or at random
7.	P = .33, P 3 = .099, L = 2, L q = 1.33, W = .125, W q = .083, U = .67
9.	L q = .9, W = .25, W q = .15; an infinite queue would form
11.	l = 9
13.	yes, install the second window
15.	(a) L q = 9.09, W = 24 min., W q = 21.6 min; (b) W = 4 min., the state should install scales
17.	W q = .56 min., add an advisor
19.	(a) P = .20; (b) L q = 1; (c) W q = 1.25 days; (d) P 3 = .1825
21.	L q = 6.34, W q = 18.39 min
23.	L q = .083, W q = .083 min
25.	W = 23.67 hr.
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27.	(a) 33%; (b) W q = 1.13 min, L q = .756; (c) P = .061
29.	W q = .007 hr.; no
31.	current service = $312; new service = $212.27; new service is better
33.	(a) no, W q = 8 min.; (b) yes, W q = 0.11 min.; (c) yes, W q = .53 min.
35.	hire clerks, 5
37.	P w =.29976, three salespeople sufficient
39.	1.14 hr.
41.	W q = 10.27 min., P = .423
43.	L q = 2.25, L = 12.25, W q = .321 wk., W = 1.75 wk., U = .833
45.	add extra employees
47.	79 A.M. = 5, 9noon = 2, noon2 P.M. = 6, 25 P.M. = 4
49.	adequate; W q = 19.1 min.
51.	(a) W q = 2.33 hr., P = .24; (b) W q = .89 hr., P = .51
53.	L = 4.06, L q = 1.86, W q = 1.01 min
55.	L q = 132.75 passengers