Motivated by some real stochastic service systems, we study a feedback retrial queue with
customer balking and unreliable servers (servers subject to breakdowns). A customer will …

A single server retrial queueing system with two phases of service for retrial customers are
investigated in this article. Here, consumers are allowed to balk at certain times. The steady …

This article deals with availability and reliability characteristics for a repairable fault-tolerant
system with warm standbys and second optional repair service. The failure times of primary …

This study examines an M/M/1 vacation queue in a random environment. This system is
considered a classical M/M/1 queueing system in which customers are served one by one in …

In this paper, a single-server queue with Modified Bernoulli Vacation (MBV) has been
considered. The server provides two kinds of services, Compulsory Service (CR) and Non …

This paper considers M [X1], M [X2]/G1, G2/1 general retrial queueing system with priority
services. Two types of customers from different classes arrive at the system in different …

We examine a single server queue arriving with Poisson batches of varying sizes. When the
system starts the service, it provides service to all the arriving customers on a first come first …

Today, with real-life problems, modeling is a primary step in organizing, analyzing and
optimizing them. Queueing theory is a particular approach used to model this category of …

In this paper, we consider two single server queueing systems to which customers of two
distinct priorities (P 1 and P 2) arrive according to a Marked Markovian arrival process …

This paper discusses a single server retrial queue with two phases of service of which the
second phase is optional. Further, the server is subjected to starting failures and takes K …