Volume 52, Number 3, July–September 2018
|Page(s)||903 - 922|
|Published online||22 October 2018|
Analysis of a queueing system in random environment with an unreliable server and geometric abandonments
College of Economics and Management, Shandong University of Science and Technology,
266590, P.R. China.
2 School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing 211800, P.R. China.
3 School of Science, Nanjing University of Science and Technology, Nanjing 210094, P.R. China.
* Corresponding author: email@example.com
Accepted: 1 March 2018
This paper studies a single server queueing model in a multi-phase random environment with server breakdowns and geometric abandonments, where server breakdowns only occur while the server is in operation. At a server breakdown instant (i.e., an abandonment opportunity epoch), all present customers adopt the so-called geometric abandonments, that is, the customers decide sequentially whether they will leave the system or not. In the meantime, the server abandons the service and a repair process starts immediately. After the server is repaired, the server resumes its service, and the system enters into the operative phase i with probability qi, i = 1, 2, …, d. Using probability generating functions and matrix geometric approach, we obtain the steady state distribution and various performance measures. In addition, some numerical examples are presented to show the impact of parameters on the performance measures.
Mathematics Subject Classification: 68M20 / 60K20 / 90B22
Key words: Server breakdown / geometric abandonments / sojourn time / cycle analysis
© EDP Sciences, ROADEF, SMAI 2018
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