Application of selected diffusion processes on system state assessment

The aim of the article is to apply selected diffusion processes in order to estimate system technical life. As we possess reasonably big set of field data the system residual technical life might be well estimated statistically. It includes the information about particles contained in oil which testify to oil condition as well as system condition. We focus on the particles which we consider to be interesting - both from the point of view towards the oil itself and also towards the system state and condition. This kind of information has good technical and analytical potential which has not been explored well yet. The way of modelling in this article is based on the specific characteristics of diffusion processes, namely the Wiener processes. Following the modelling results we could in fact set the principles of "CBM - Condition Based Maintenance", mission planning, life cycle costing, etc.