3.1 Theories/Models and Use of Loss Causation Techniques(사고발생이론의 이해)-3 ◈ Fault Tree Analysis (FTA: 결함수 분석) The fault tree is a logic diagram based on the principle of multi-causality, which traces all branches of events which could contribute to an accident or failure. A faul tree diagram is drawn from the top down. The starting point is the undesired event of interest(called the Top Event becau..