This paper studies the / / 1 Geo G queue model with , p N policy set-up time, multiple vacation and disasters. The server will start up the random set-up period with the probability p if the customer number is at least N at the end of a random length V of the holiday. Otherwise, the server takes vacation repeatedly with the probability p . Using embedded Markov chain and supplemental variable m...

The goal of this paper is to establish a general approach for analyzing queueing models with repeated inhomogeneous vacations. The server goes on for a vacation if the inactivity prolongs more than the vacation trigger duration. Once the system enters in vacation mode, it may continue for several consecutive vacations. At the end of a vacation, the server goes on another vacation, possibly with...

Nature, landscape, relaxation, and outdoor activities are important motivations when choosing rural destinations for vacations. Therefore, selecting a area as vacation destination, we assume that climate features important. We investigated the appropriateness of holiday index: urban (HCI:urban) in quantitatively describing relationship between tourism fluxes such destinations. employed data fro...

A complex multi-state redundant system with preventive maintenance subject to multiple events is considered. The online unit can undergo several types of failure: both internal and those provoked by external shocks. Multiple degradation levels are assumed as external. Degradation observed random inspections and, if they major, the goes a repair facility where carried out. This composed single r...

Many models for customers impatience in queueing systems have been studied in the past; the source of impatience has always been taken to be either a long wait already experienced at a queue, or a long wait anticipated by a customer upon arrival. In this paper we consider systems with servers vacations where customers’ impatience is due to an absentee of servers upon arrival. Such a model, repr...