The current study considers a Markovian queue, where the server is subject to breakdowns
while providing service to customers. During a breakdown period, the server lowers the …

This study considers the M/M/1/N queue with working breakdowns and server vacations. We
assume that the arrivals occur according to a Poisson process. The server is subject to …

This paper deals with a cold standby repairable system with two identical units and one
repairman who can do extra work in idle time. The authors are devoted to studying the …

This study develops novel reliability models for discrete-time cold standby repairable
systems with unreliable repair facility and retrial mechanism. In view of the situation that the …

Vacations queues are motivated from the need of utilizing the server when it is idle. Most of
papers in the literature assume that consecutive vacations follow the same distribution …

As an effective means to improve system reliability, cold standby redundancy design has
been applied in many fields. Studies on the reliability of systems with retrial mechanisms …

We consider a vacation queueing model with Poisson arrivals, general service distribution
and differentiating vacation. The server begins a type I vacation of random length each time …

We consider a single server queueing system with differentiated non working vacations in
which the server can take two kinds of vacations with distinct durations. We also distinguish …

This paper considers a repairable k-out-of-n: G system with repairman's multiple delayed
vacations where the operating times and the repair times of components are governed by …