Simulation and Calculation of Reliability Performance and Maintenance Costs

Hagmark P-E, Virtanen S, Tampere University of Technology

Annual Reliability and Maintainability Symposium (RAMS)
22-25 January, 2007

“Our model for the simulation and calculation of reliability performance and maintenance costs is based on a generalized fault tree approach, where the TOP represents the product to be designed. The fault tree consists of entities, which essentially affect the failure tendency and the repair time of the product. The relations between entities are modeled by two mechanisms. The “gates” determine the partly logical and partly stochastic propagation of faults (primary states). The “strategies” define other relations between TOP and the deepest entities. A consequence of the strategies is that two types of “waiting” (secondary states) can occur.”

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