Simulation of virtual enterprises manufacturing integral circuits

Current trend of the CALS technology development - virtual enterprise design, is considered. In order to evaluate alternate design solutions it is proposed to use simulation modeling methods. Basic principles of simulation model development, rules for synthesizing spaces of input and output signals as well as spaces of internal states for the aggregates located on adjacent levels of the hierarchical aggregative framework, are identified. Recurrent relationships between operators determining state change and output signal generation for the aggregates located at adjacent levels of hierarchical aggregative framework, are defined.