A computer program, a computer-readable medium and to a system and method for checking an industrial facility formed as an automation facility, wherein real components of a provided real facility and/or data stemming from the real facility and/or simulated components of a provided simulated facility and/or data stemming simulated facility are manipulated using a computer program that includes at least one random algorithm, in particular during ongoing operation, such that random-based fault situations are caused in the real facility and/or the simulated facility.