User's Manual

Engineering ACD applications with report data
Issue 5.0 May 2005 137
Therefore, the agency will need 15 trunks to satisfy its customers.
ACD trunk engineering table
Number
of
trunks
Blocking probability
0.01% 0.02% 0.05% 0.10% 0.20% 0.50% 1.00% 2.00% 5.00%
1 0.0002 0.0003 0.0006 0.0011 0.0021 0.0050 0.0100 0.0200 0.0500
2 0.0142 0.0202 0.0321 0.0457 0.0652 0.1049 0.1511 0.2190 0.3622
3 0.0868 0.1102 0.1516 0.1936 0.2482 0.3473 0.4509 0.5902 0.8544
4 0.2347 0.2824 0.3622 0.4388 0.5340 0.6977 0.8607 1.070 1.448
5 0.4519 0.5269 0.6482 0.7614 0.8981 1.126 1.347 1.624 2.108
6 0.7282 0.8314 0.9952 1.145 1.323 1.614 1.890 2.230 2.812
7 1.054 1.186 1.392 1.577 1.795 2.147 2.476 2.877 3.551
8 1.422 1.582 1.829 2.049 2.306 2.716 3.096 3.555 4.316
9 1.825 2.013 2.300 2.555 2.849 3.316 3.745 4.258 5.102
10 2.260 2.474 2.801 3.089 3.420 3.941 4.417 4.982 5.905
12 3.207 3.473 3.876 4.227 4.628 5.253 5.817 6.482 7.553
14 4.238 4.555 5.030 5.441 5.907 6.630 7.278 8.036 9.243
16 5.338 5.703 6.246 6.715 7.244 8.059 8.786 9.632 10.97
18 6.495 6.905 7.515 8.038 8.626 9.530 10.33 11.26 12.72
20 7.700 8.154 8.827 9.402 10.05 11.04 11.91 12.92 14.49
25 10.88 11.44 12.26 12.96 13.74 14.92 15.96 17.15 18.99
30 14.24 14.90 15.86 16.67 17.57 18.94 20.13 21.49 23.56
35 17.75 18.49 19.58 20.50 21.52 23.05 24.39 25.91 28.19
40 21.37 22.19 23.40 24.42 25.55 27.24 28.72 30.38 32.87
45 25.08 25.98 27.31 28.42 29.65 31.50 33.10 34.89 37.57
50 28.86 29.85 31.28 32.48 33.81 35.80 37.52 39.45 42.31
60 36.62 37.75 39.38 40.75 42.27 44.53 46.48 48.65 51.84
70 44.57 45.83 47.66 49.19 50.88 53.39 55.55 57.95 61.43