ASSESSMENT OF OBSERVABILIТY FOR ТНЕ POINTS OF А PIPELINE CIRCUIT OF ТНЕ DIGITAL COMPONENTS IN SAFETY?RELATED SYSTEMS

А problem of the hidden faults without solving of which the fault tolerant structure of the digi-tal сотponents does not guarantee function safety of the safety?critical systems is considered. The problem is shown in the potentially hazardous circuit points, which in а normal mode сап accumulate the hidden faults reducing the fault tolerance of the digital component at transition to ап emergency mode of the system operation. А model of the activated path for pipeline circuit of the digital component is offered. It allows determining input data for calculation of point ob-servability in modes of the system. А method of potentially hazardous point identification for pipeline circuit of the digital component is developed.