Chapter 13


[Page 786 ( continued )]
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.


[Page 787]
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




Introduction to Management Science
Introduction to Management Science (10th Edition)
ISBN: 0136064361
EAN: 2147483647
Year: 2006
Pages: 358

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