Fault tree analysis is simply a method of finding the root causes of potential failures in a business or organization. It then helps the people affected to understand, solve and prevent the failure from happening. Analysis of FTA begins with the happening in the top-level such as an outage of service. The personnel must then work on it downward to analyze all the contributing factors and causes of the problem. A fault tree diagram is usually used to determine the countermeasures to get rid of the causes of the problem. A fault tree analysis only requires a paper, pen, and an idea of the services that have to be analyzed.
 

There are steps that can be followed to get the most from FTA. The first step is to be specific when choosing the top level event for evaluation. Determine the error that led to the top level event and for each error, try to list as many causes as possible represented by boxes that is below each related error. A logical operator such as an AND and an OR logic gate can be used to represent the series of errors and each causes. Continue to determine the cause of each error until the main cause has been reached. If the root or main cause has been reached and identified, try to do something about it by thinking of the appropriate countermeasure that can be applied to each cause. Fault tree analysis is very easy and simple. Making a fault tree sometimes lead to great ideas and probable solutions to a problem even before it exist.

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