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Advancing the Concepts & Practices of Information Resources Management in Modern Organizations

Analysis of Two Phases Queue With Vacations and Breakdowns Under T-Policy

Analysis of Two Phases Queue With Vacations and Breakdowns Under T-Policy
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Author(s): Khalid Alnowibet (King Saud University, Saudi Arabia) and Lotfi Tadj (Fairleigh Dickinson University, Canada)
Copyright: 2018
Pages: 14
Source title: Encyclopedia of Information Science and Technology, Fourth Edition
Source Author(s)/Editor(s): Mehdi Khosrow-Pour, D.B.A. (Information Resources Management Association, USA)
DOI: 10.4018/978-1-5225-2255-3.ch136

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Abstract

The service system considered in this chapter is characterized by an unreliable server. Random breakdowns occur on the server and the repair may not be immediate. We assume the possibility that the server may take a vacation at the end of a given service completion. The server resumes operation according to T-policy to check if enough customers have arrived while he was away. The actual service of any arrival takes place in two consecutive phases. Both service phases are independent of each other. A Markov chain approach is used to obtain the steady state system size probabilities and different performance measures. The optimal value of the threshold level is obtained analytically.

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