Event Tree Analysis (ETA) is a risk assessment technique used to identify potential risks and outcomes associated with a given situation. It is a graphical representation of the various possible outcomes of a given event or situation. The technique is used to identify potential risks and to identify the probability of occurrence of each risk. Event Tree Analysis is used to analyze the possible consequences of a particular event or situation, and to identify the most likely outcome. It is also used to identify the most effective ways to mitigate the risks associated with the event or situation. The technique involves constructing a tree-like diagram with the various possible outcomes of the event or situation. Each branch of the tree represents a different outcome, and the probability of each outcome is determined by the number of branches leading to it. Event Tree Analysis is an important tool for risk management and can be used to identify potential risks and to develop strategies to mitigate them.