RT Journal Article T1 Algorithmic analysis of the maximum queue length in a busy period for the M/M/c retrial queue A1 Artalejo Rodríguez, Jesús Manuel A1 Economou, A. A1 López Herrero, María Jesús AB This paper deals with the maximum number of customers in orbit (and in the system) during a busy period for the M/M/c retrial queue. Determining the distribution for the maximum number of customers in orbit is reduced to computation of certain absorption probabilities. By reducing to the single-server case we arrive at a closed analytic formula. For the multi-server case we develop an efficient algorithmic procedure for computation of this distribution by exploiting the special block-tridiagonal structure of the system. Numerical results illustrate the efficiency of the method and reveal interesting facts concerning the behavior of the M/M/c retrial queue. PB Informs SN 1091-9856 YR 2007 FD 2007 LK https://hdl.handle.net/20.500.14352/49934 UL https://hdl.handle.net/20.500.14352/49934 LA eng NO University of Athens Grant ELKE/70/4/6415 NO PYTHAGORAS/2004 DS Docta Complutense RD 30 dic 2025