Community Research and Development Information Service - CORDIS


In many real systems, failures occurring to the components, control failures and human interventions often interact with the physical system evolution in such a way that a simple reliability analysis, decoupled from process dynamics, is very difficult or even impossible. In the last 10 years many dynamic reliability approaches have been proposed to properly assess the reliability of these systems characterized by dynamic interactions. The DYLAM methodology, now implemented in its latest version DYLAM-3, offers a powerful tool for integrating deterministic and failure events. This paper describes the main features of the DYLAM-3 code with reference to the classic fault tree and event tree techniques. Some aspects connected to the practical problems underlying dynamic event trees are also discussed. A simple system, already analyzed with other dynamic methods is used as a reference for the numerical applications. The same system is also studied with a time dependent fault tree approach in order to show some features of dynamic methods versus classic techniques. Examples including stochastic failures, without and with repair, failures on demand, and time dependent failure rates given an extensive overview of DYLAM-3 capabilities.

Additional information

Authors: COJAZZI G, JRC Ispra (IT)
Bibliographic Reference: Article: Reliability Engineering Systems Safety (1995)
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