Risk Assessment Based upon Fuzzy Set Theory

Safety and reliability are essential issues in modern sciences. Modern technical systems should meet technical, safety and environmental protection requirements. The risk can appear as personal injury or death, mission degradation, property technical damage or destruction. The risk is a measure of harm or loss associated with the human activity. It is the combination of the probability and the consequence of a specified hazard being realized. For decision making we need the opinions of other sciences, sometimes we have to consider moral questions. To make reliable decision, the risk of the given system or process should be known correctly. Fuzzy set theory is a new mathematical tool to model inaccuracy and uncertainty of the real world and human thinking. The paper shows the possibility of use of the fuzzy set theory to assess the risk