Review of matrix methods for risk assessment in water supply system

In this work the matrix methods for risk assessment in water supply system SZW have been presented. The three risk levels were assumed: tolerable, controlled and unacceptable. The two parametric matrix for risk assessment combines the point scale of the probability that the threat appears (P) with the point scale of the consequences ( C ). The novelty in the attitude to risk assessment is taking into account that the system protection (O) is inversely proportional to the parameters P, C, E and N.