采用IEC 62502:2010规定了事件树分析（ETA）的综合基本原则，并就始发事件的后果建模以及在可靠性和风险相关措施的背景下定性和定量分析这些后果提供了指导。

Adopts IEC 62502:2010 to specify the consolidated basic principles of Event Tree Analysis (ETA) and provides guidance on modelling the consequences of an initiating event as well as analysing these consequences qualitatively and quantitatively in the context of dependability and risk related measures.