Which approach does Event Tree Analysis (ETA) utilize?

Event Tree Analysis (ETA) utilizes an inductive, bottom-up approach, which focuses on examining the potential outcomes of an initiating event. This method begins with a specific event that can trigger a series of possible outcomes or consequences. By analyzing how these events may unfold, ETA looks at the interactions and pathways leading to various end states or scenarios, thus systematically mapping these possibilities.

In this approach, the analysis starts with the event that has occurred and creatively explores its ramifications rather than attempting to deduce outcomes from a broad set of general principles. This is particularly useful in safety assessments and risk management, as it helps identify potential failures and the multitude of consequences that may arise from a single initiating incident. The focus is on building from specific events towards a complete understanding of their potential effects, which is the hallmark of a bottom-up methodology.