Markovian queue optimisation analysis with an unreliable server subject to working breakdowns and impatient customers

2013 ◽  
Vol 46 (12) ◽  
pp. 2165-2182 ◽  
Author(s):  
Cheng-Dar Liou
Mathematics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 594 ◽  
Author(s):  
Yacov Satin ◽  
Alexander Zeifman ◽  
Alexander Sipin ◽  
Sherif I. Ammar ◽  
Janos Sztrik

In this paper, a class of queueing models with impatient customers is considered. It deals with the probability characteristics of an individual customer in a non-stationary Markovian queue with impatient customers, the stationary analogue of which was studied previously as a successful approximation of a more general non-Markov model. A new mathematical model of the process is considered that describes the behavior of an individual requirement in the queue of requirements. This can be applied both in the stationary and non-stationary cases. Based on the proposed model, a methodology has been developed for calculating the system characteristics both in the case of the existence of a stationary solution and in the case of the existence of a periodic solution for the corresponding forward Kolmogorov system. Some numerical examples are provided to illustrate the effect of input parameters on the probability characteristics of the system.


2020 ◽  
Vol 62 (1) ◽  
pp. 89-120
Author(s):  
GOPINATH PANDA ◽  
VEENA GOSWAMI

We study impatient customers’ joining strategies in a single-server Markovian queue with synchronized abandonment and multiple vacations. Customers receive the system information upon arrival, and decide whether to join or balk, based on a linear reward-cost structure under the acquired information. Waiting customers are served in a first-come-first-serve discipline, and no service is rendered during vacation. Server’s vacation becomes the cause of impatience for the waiting customers, which leads to synchronous abandonment at the end of vacation. That is, customers consider simultaneously but independent of others, whether to renege the system or to remain. We are interested to study the effect of both information and reneging choice on the balking strategies of impatient customers. We examine the customers’ equilibrium and socially optimal balking strategies under four cases of information: fully/almost observable and fully/almost unobservable cases, assuming the linear reward-cost structure. We compare the social benefits under all the information policies.


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