%0 Journal Article %A Dziula, Przemyslaw %A Jurdzinski, Miroslaw %A Kolowrocki, Krzysztof %A Soszynska, Joanna %T On Ship Systems Multi-state Safety Analysis %J TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation %V 1 %N 2 %P 199-205 %D 2007 %U ./Article_On_Ship_Systems_Multi-state_Safety_Dziula,2,27.html %X A multi-state approach to defining basic notions of the system safety analysis is proposed. A system safety function and a system risk function are defined. A basic safety structure of a multi-state series system of components with degrading safety states is defined. For this system the multi-state safety function is determined. The proposed approach is applied to the evaluation of a safety function, a risk function and other safety characteristics of a ship system composed of a number of subsystems having an essential influence on the ship safety. Further, a semi-markov process for the considered system operation modelling is applied. The paper also offers an approach to the solution of a practically important problem of linking the multi-state system safety model and its operation process model. Finally, the proposed approach is applied to the preliminary evaluation of safety characteristics of a ship system in varying operation conditions. %@ 2083-6473