An M/G/1 queue with second optional service
Queueing Systems: Theory and Applications
A Single Server Poisson Input Queue with a Second Optional Channel
Queueing Systems: Theory and Applications
An M/G/1 queue with second optional service and server breakdowns
Computers & Mathematics with Applications
Mathematical and Computer Modelling: An International Journal
A two-stage batch arrival queueing system with a modified bernoulli schedule vacation under N-policy
Mathematical and Computer Modelling: An International Journal
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This paper deals with an infinite-capacity multi-server queueing system with a second optional service (SOS) channel. The inter-arrival times of arriving customers, the service times of the first essential service (FES) and the SOS channel are all exponentially distributed. A customer may leave the system after the FES channel with a probability (1-@q), or the completion of the FES may immediately require a SOS with a probability @q (0=