Availability analysis for series-parallel systems

The application of complex redundancy relationships can enhance the cost-effective achievement of system availability objectives, but makes analysis more difficult. An automated state probability model called RELCOM2 is presented that can facilitate analysis, and assure accurate evaluation. The model can analyze a complex arrangement of up to six blocks, each comprised of up to 99 units. Larger numbers of units may be analyzed, but standard block diagram display formats are limited to 99. Since redundancy relationships in systems like AEGIS use large numbers of parallel units, such capacity is important in their analysis