Unascertained Measure-New Safety Assessment Tool: Foundation and Application

To overcome the shortcomings of the Fuzzy Set which is a common safety assessment measure, the unascertained measure was proposed and the credible identification was set up after the introduction of the basic knowledge of the Unascertained Sets including the essential difference between the Unascertained Sets and the Fuzzy Sets. Then, the method was introduced into the safety assessment of offshore jacket and modular loadout. Finally, engineering practice showed that the method proposed here can complete the safety assessment systematically and scientifically without any assumption. The work has significance in theory and practice for safety assessment.