RT Journal Article T1 Multi-server retrial model with variable number of active servers A1 Artalejo Rodríguez, Jesús Manuel A1 Orlovsky, D. S. A1 Dudin, Alexander N. AB This paper deals with a multi-server retrial queueing model in which the number of active servers depends on the number of customers in the system. To this end, the servers are switched on and off according to a multithreshold strategy. For a fixed choice of the threshold levels, the stationary distribution and various performance measures of the system are calculated. In the case of equidistant connection levels, the optimum threshold level is numerically computed. PB Pergamon Press, Inc. SN 0360-8352 YR 2005 FD 2005-03 LK https://hdl.handle.net/20.500.14352/50017 UL https://hdl.handle.net/20.500.14352/50017 LA eng NO The authors would like to thank the referees for their constructive comments on an earlier version of the paper. J. R. Artalejo thanks the support received from the research project BFM2002-02189. DS Docta Complutense RD 9 abr 2025