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1 Journal of Polish Safety and Reliability Association

1 2011

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Critical situations and human resources in discrete transportation systems analysis

Walkowiak T., Mazurkiewicz J.

Journal of Polish Safety and Reliability Association

2011

Vol. 2, No. 1

205--216

The paper presents an approach to critical situations analysis related to discrete transportation systems (DTS). The critical situation is understood as sudden shortage of some system recourses resulting in the transportation system performance degradation. The analysis is realized based on availability calculation of DTS. The system is described by the formal model, which includes reliability and functional parameters of DTS as well as human resources – drivers and management system. The availability and average availability of the system, defined in a functional way, is discussed as a function of different essential parameters of DTS. The proposed analysis is based on the modelling and simulating of the system behaviour using Monte-Carlo approach. The paper presents some exemplar systems – based on real Polish Post DTS – modelling and results.