1/31/2024 0 Comments Risk probability tutorialGeneral Manager was very concerned about the accident and requested the Safety Officer in charge to evaluate the system. In other words, the TOP undesirable event occurs if one or more minimal cut set occurs.Įx: (X and Y) (X and Z) from the below picture Practical Example of FTAĪ fire broke out at unit 1 of XYZ cable manufacturing company despite the safety system in place. Minimal cut set: A cut set with a minimal number of events that can still cause the TOP undesirable event. For instance, complex and large fault trees have to use superior tools (algorithms for extraction) to get the minimal cut sets.īasic events that together cause the TOP undesirable event. One of the important factors in the qualitative analysis of fault trees is to identify a minimal cut set. Calculate the probability of the lowest level elements occurrence and also measure the probabilities from the bottom up.Finally, complete and evaluate the FTA.Repeat the same steps till the basic causes,.Identify the second-level contributors and link to the top by using logical gates.Link these contributors to the top-level event using logical gates (AND, OR gates), and also see the relationship to help identify the appropriate logical gate. ![]()
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