This paper considers a parallel system of queues fed by independent arrival streams, where the service rate of each queue depends on the number of customers in all of the queues. Necessary and sufficient conditions for the stability of the system are derived, based on stochastic monotonicity and marginal drift properties of multiclass birth and death processes. These conditions yield a sharp ch...

This paper aims at introducing our latest research efforts in the fields of performance analysis, stochastic logics and Grid technology adaptation. We are currently exploring a new approach for a humanfriendly and intelligent graphical specification of Quality of Service-related performance requirements for industrial-scale real-life systems. Such systems are modelled by stochastic Petri nets, ...