Artalejo Rodríguez, Jesús ManuelGómez-Corral, AntonioNeuts, M.F.2023-06-202023-06-2020010377-221710.1016/S0377-2217(00)00330-1https://hdl.handle.net/20.500.14352/57383We consider multiserver retrial queues in which the time between two successive repeated attempts is independent of the number of customers applying for service. We study a Markovian model where each arriving customer finding any free server either enters service or leaves the service area and joins a pool of unsatisfied customers called 'orbit'. This system is analyzed as a quasi-birth-and-death (QBD) process and its main performance characteristics are efficiently computed.engjournal articlehttp://www.sciencedirect.com/science/article/pii/S0377221700003301http://www.sciencedirect.comopen access519.8Queueingquasi-birth-and-death processesperformance analysisretrial queuesInvestigación operativa (Matemáticas)1207 Investigación Operativa