"Variated Availability" Approach to the Services Manageable Delivering

By continuous increase of communication solutions usage, network operators must ensure their networks are capable of delivering high quality, innovative services quickly and cost-effectively. Besides, hardware and software vendors face different challenges including increased complexity, tight schedules, shrinking budgets and evolving standards. The open still developing standards, allow abstracting the service availability middleware from other components in the platform. In turn, the service availability is becoming fundamental metric in evaluating components for network-centric applications. Thus, in this paper, we analyze first a service availability notion from different viewpoints, its role as well as an impact onto the different applications performance. And then, we propose and develop a model for the performance of the mathematical analysis of the service availability in heterogeneous network environment. We also present in our paper theoretical results of the expected response and waiting time and build the abstract diagrams for further practical usage.