Discrete Transportation System’s Availability Problem in Case of Critical Situation Sets

The paper discusses the discrete transportation system’s (DTS) availability problem in case of the critical situation, which happens during its ordinary work. The formal model of the transportation system suitable for modelling based on the system behaviour observation is proposed. Monte Carlo approach is in use for a simulation. The system’s availability is calculated as global metric to find if the system is able to realise the loaded set of tasks. The critical situation discussed there is caused by reliability, as well as by functional and human reasons. No restriction on the system’s topology and on a kind of distribution describing the system’s functional and reliability parameters is the main advantage of the approach. The proposed solution seems to be essential for the owner and administrator of the transportation systems.