Authors: R. Sudhesh; R. Sebasthi Priya
Addresses: Department of Mathematics, Anna University, BIT Campus – Tiruchirappalli, India ' Department of Mathematics, Anna University, BIT Campus – Tiruchirappalli, India
Abstract: A discrete-time queue with feedback subject to system disaster, server failures and repair is considered in this paper. The time-dependent system-size probabilities are obtained by using generating functions where the system of difference equations in two parameters namely time epoch (m) and number of customers (n) are transformed into another difference equation in terms of generating functions. The difference equations of generating functions satisfy a three-term recurrence relation which leads to continued fraction. System-size probabilities and some performance measures in steady-state are derived. Further, busy period distribution, reliability and availability are also obtained. Numerical illustrations are provided for different parameter values to see their effect on performance measures and to get more in-sight of the model behaviour.
Keywords: disasters; feedback; reliability; busy period; continued fractions.
International Journal of Operational Research, 2019 Vol.35 No.1, pp.37 - 53
Received: 27 Oct 2015
Accepted: 30 May 2016
Published online: 06 May 2019 *