A conditioning event is a restriction on a logic gate in the diagram. You create the logical structure by using gates. A fault tree is a graphical representation of a logical structure representing undesired events ('failures') and their causes. Undeveloped event usually denotes something that needs no further breakdown or investigation or an event for which no further analysis is possible because of a lack of information. Data import from RiskSpectrum, Aralia SimTree and CAFTA Fault Tree Analysis is one of the most widely used methods in system reliability and failure probability analysis. It's an event that is normal and guaranteed or expected to occur. An external event is usually depicted with a symbol that looks like a house. The primary or basic failure event is usually denoted with a circle. There are two basic types of fault tree diagram notations: events and logic gates.
#Cafta fault tree software#
However, fault tree analysis can also be used during software development to debug complex systems. You can use a fault tree diagram to help you design quality tests and maintenance procedures.įault tree analysis is useful in engineering, especially in industries where failure can have huge consequences such as nuclear power or aeronautics. In many ways, the fault tree diagram creates the foundation for any further analysis and evaluation.įor example, when changes or upgrades are made to the system, you already have a set of steps to evaluate for possible effects and changes. It helps others quickly understand the results of your analysis and pinpoint weaknesses in the design and identify errors.Ī fault tree diagram will help prioritize issues to fix that contribute to a failure. Benefits of Fault TreesĪ fault tree creates a visual record of a system that shows the logical relationships between events and causes lead that lead to failure. Fault tree analysis helps determine the cause of failure or test the reliability of a system by stepping through a series of events logically. Fault Tree Analysis What is a Fault Tree Analysis?Ī fault tree diagram is used to conduct fault tree analysis (or FTA).