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. 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. Risk assessment is a basic tool of every management system (at this time very important for quality management system). It enables appropriate decision making. Being prepared to manage risks involves the ability to identify them, assess them and take appropriate measures. Today’s construction does not only involve the manufacture of products but also designing procedures for other areas of human activity. There are numerous interdisciplinary methods that enable us to create new products. New products = new threats.