In this paper the problem of determining the probability of multiprocessing control system falling into one of states marked as dangerous, were formalized. Statistical estimates of the probability that a system is in a dangerous state were obtained. This estimates, may help in providing safety for multiprocessor systems. There were proposed equations to change the estimation for probability of system falling into a dangerous state during operation for multi-processor systems with embedded self test feature. Key words: control system, dangerous state, failure.
