“…In [8], Borkakaty For arrivals of variable size following a Poisson distribution, Claeys et al [9] analyze the model M X /GI l,c /1, where the server remains idle until there is at least l customers waiting and can serve at most c customers simultaneously. With geometric distribution for arrivals and services, in [10], they present the model Geo X /Geo c /1 under two different policies: in the first, the server starts a new service although the number of clients does not reach c; in the second, the server waits until the number of clients reaches c. A related model, the GI/Geo/1 queue under N-policy, is analyzed by Lim et al [11].…”