RT Journal Article SR Electronic A1 Oravec, Milan A1 Kováčová, Barbora T1 Risk Assessment Tools for Nonlinear Dynamic Systems JF Acta Mechanica Slovaca YR 2012 VO 16 IS 1 SP 74 OP 82 DO 10.21496/ams.2012.009 UL https://www.actamechanica.sk/artkey/ams-201201-0009.php AB Tools for quantitative risk assessment used in praxis are predominantly based on linear transformations. A parallel problem of current risk assessment methods is constant time and imperceptions of variability of threat over the course of time. Bertalanffy, Wiener, Haken, and Prigogine emphasized interdisciplinary approach and its potential utilization in risk assessment. Two specific cases of causal dependence are domino effect and synergic effect. Risk as an attribute of causal dependence is common for all present management systems. The paper deals with details of synergic effect mechanism, its identification and possible utilization in the field of safety.