Research Article
An M/M/2 Queueing System with Heterogeneous Servers Including One with Working Vacation
Table 1
Case A:
,
,
and
. Case B:
,
,
and
.
| | A/B | | | | | | | | | |
| 2 | A | 0.829 | 0.913 | 0.065 | 0.022 | 1.676 | 0.002 | 0.080 | 0.496 | 1.167 | B | 0.707 | 0.916 | 0.070 | 0.014 | 2.176 | 0.005 | 0.125 | 0.482 | 1.17 | 4 | A | 0.687 | 0.745 | 0.168 | 0.087 | 1.934 | 0.009 | 0.067 | 0.246 | 1.128 | B | 0.520 | 0.755 | 0.188 | 0.057 | 2.301 | 0.016 | 0.097 | 0.236 | 1.156 | 6 | A | 0.550 | 0.568 | 0.246 | 0.186 | 2.189 | 0.017 | 0.062 | 0.166 | 1.121 | B | 0.374 | 0.574 | 0.296 | 0.130 | 2.60 | 0.031 | 0.088 | 0.164 | 1.203 | 8 | A | 0.414 | 0.405 | 0.285 | 0.311 | 2.547 | 0.027 | 0.062 | 0.132 | 1.172 | B | 0.251 | 0.399 | 0.363 | 0.238 | 3.178 | 0.047 | 0.094 | 0.143 | 1.362 | 10 | A | 0.282 | 0.262 | 0.278 | 0.460 | 3.193 | 0.036 | 0.072 | 0.122 | 1.340 | B | 0.150 | 0.245 | 0.365 | 0.390 | 4.282 | 0.062 | 0.120 | 0.153 | 1.755 | 12 | A | 0.158 | 0.141 | 0.218 | 0.641 | 4.702 | 0.043 | 0.106 | 0.144 | 1.849 | B | 0.074 | 0.123 | 0.282 | 0.595 | 6.626 | 0.069 | 0.191 | 0.216 | 2.818 | 14 | A | 0.049 | 0.042 | 0.092 | 0.866 | 11.885 | 0.047 | 0.294 | 0.324 | 4.659 | B | 0.020 | 0.034 | 0.113 | 0.853 | 16.043 | 0.064 | 0.566 | 0.585 | 8.418 |
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