Skip to main content

FAULT TREE ANALYSIS

 Fault tree analysis (FTA) is a top-down, deductive failure analysis in which an undesired state of a system is analyzed using Boolean logic to combine a series of lower-level events.

This analysis method is mainly used in safety engineering and reliability engineering to understand how systems can fail, to identify the best ways to reduce risk and to determine (or get a feeling for) event rates of a safety accident or a particular system level (functional) failure.

FTA is used in the aerospace, nuclear power, chemical and process, pharmaceutical, petrochemical and other high-hazard industries; but is also used in fields as diverse as risk factor identification relating to social service system failure.

FTA is also used in software engineering for debugging purposes and is closely related to cause-elimination technique used to detect bugs.

In aerospace, the more general term "system failure condition" is used for the "undesired state" / top event of the fault tree. These conditions are classified by the severity of their effects. The most severe conditions require the most extensive fault tree analysis.

These system failure conditions and their classification are often previously determined in the functional hazard analysis.






Comments

Post a Comment

Popular posts from this blog

Accident / Incident Ratio Studies (F.E Bird Triangle)

The accident triangle, also known as Heinrich's triangle or Bird's triangle, is a theory of industrial accident prevention. It shows a relationship between serious accidents, minor accidents and near misses and proposes that if the number of minor accidents is reduced then there will be a corresponding fall in the number of serious accidents The triangle was first proposed by Herbert William Heinrich in 1931 and has since been updated and expanded upon by other writers, notable Franck E. Bird. It is often shown pictorially as a triangle or pyramid and has been described as a cornerstone of 20th century workplace health and safety philosophy. In recent times, it has come under criticism over the values allocated to each category of accident and for focusing only on the reduction in minor injuries. There is no shortage of data on incidents such as accidents or near misses. Some researchers have studied the figures in details and concluded that there appears to be a relationship b...
Post a Comment
Read more

Accident / Incident and Ill-Health Data Rates

 Incident data can be used to support hazard identification, risk assessment and risk factor. Some of the accidents data collected is used to generate the statistics required by legislation but other uses are to: Classify industries according to risk. Classify workplaces. Classify occupations. Consider accident trends. Consider accident trends. Consider part of the body injured - use of protective clothing. Use ' Cause of injury' to determine hazards in a workplace. Consider where the fault lies. Measure the effect of preventive / control measure. It can sometimes be difficult to obtain and interpret such information. Accident and Disease Ratios In making comparisons between various industries, or between work areas in the same factory, it is useful to consider the commonly used accident and disease rates. Following are some Calculations Incidence Rate Incidence reflects the number of new cases in relation to the number at risk. This is Calculated from:      ...
Post a Comment
Read more

World Safety Day - 28 April

History of 28 - April;   The annual World Day for Safety and Health at Work on 28 April promotes the prevention of occupational accidents and diseases globally. It is an awareness-raising campaign intended to focus international attention on the magnitude of the problem and on how promoting and creating a safety and health culture can help reduce the number of work-related deaths and injuries. The ILO celebrates the World Day for Safety and Health at Work on the 28 April to promote the prevention of occupational accidents and diseases globally. It is an awareness-raising campaign intended to focus international attention on emerging trends in the field of occupational safety and health and on the magnitude of work-related injuries, diseases and fatalities worldwide. With the celebration of the World Day for Safety and Health at Work, the ILO promotes the creation of a global preventative safety and health culture involving ILO constituents and all key stakeholders in this field...
Post a Comment
Read more