Oluline oht on oht, mis on identifitseeritud kui asjassepuutuv ja mis nõuab projekteerijalt spetsiifilist tergutsemist riski kõrvaldamiseks või vähendamiseks vastavalt riskihindamisele.
Significant hazard is a hazard which has been identified as relevant and which requires specific action by the designer to eliminate or to reduce the risk according to the risk assessment.