TSAR - tool for system availability and reliability analysis

The article describes the tool for system availability and availability analysis, named TSAR. Failure and repair models are based on Markov process defined by states and transitions. Availability and reliability analysis uses discrete event Monte Carlo simulation or analytical calculation. System state being a function of comprised module states serves as the base of simulation calculation, while the analytical calculation uses logical terms representing all paths between end modules in the system. The tool is implemented in the Cosmos simulation kernel and the Cosmos GUI.