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Complex mechatronic systems sometimes do work in difficult and adverse environment. Such environment may affect the system’s performance and also dependability characteristics. Since we use complex systems with one shot items we need to know basic characteristics of such a system. The paper deals with advanced mathematical methods used for field data assessment in order to prove presumed impact of mission profile and system real operation profile onto system reliability. Thank to the collected data set it is assumed that operation of the system is actually a kind of time series. The paper presents identification of the time series model, its parameters´ estimation and prediction of system characteristics – like reliability/survivability function of the system for instance. Since the model of the time series has not been known, correlations with other system can be further determined and mission duration estimated. This estimation helps to organize support and operation of the system.

Contribution to Availability Assessment of Complex Systems with one Shot ItemsAs we use complex systems with one shot items in many technical applications we need to know basic characteristics of such a system. Performance, safety and others are as much important as dependability measures. As the one shot item is supposed to back up the main system function the total reliability of the system should be higher then. The paper will present a theoretical approach to determining the complex system task/mission success probability rather than a theoretical approach to determining the dynamic reliability (operational availability), and then a practical example.

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