Xaba: Exact, Approximate, And Asymptotic Solvers For Multi-Class Closed Queueing Networks

In this paper we present a graphical software tool, Xaba, that implements exact, approximate, and asymptotic solutions for multi-class closed queueing networks with product form solution. It was specifically designed for the evaluation of complex systems with large numbers of customers of different types, starting from small populations until very large ones (e.g., tens of stations and hundreds of customers). The tool was developed for Unix systems under the X11 environment and is available for a variety of platforms. Its functionalities are illustrated via the case study of the evaluation of a corporate intranet.