How To Understand Fault Tree Analysis

Fault tree analysis is a form of scrutiny that diagrams possible faults. This involves examination of events in a course of action that could result in certain malfunctions or failures and is usually shown in the form of a tree diagram. 

A fault tree has the following makeup:

  1. It uses Boolean logic. Boolean logic means that determines relationship between entities. They use logical operators like "AND," "OR," and "NOT." This type of logical approach is used extensively in computer programs.
  2. Engineers most likely use it. Traditionally, it was mainly used in the field of safety engineering. It required that the engineer who designs it must have entrenched awareness of the structure being analyzed. However, reliability engineers also use it. The latter is actually developed by mathematicians to predict probability tree of faults arising in the system.
  3. Employed for perilous ventures.  Risky projects that might affect many lives utilize this type of analysis in design. It could identify probable mishaps and eradicate steep design modifications. It could be incorporated as a diagnostic tool for a system breakdown.
  4. Made-up of subsystem fault analysis branches.  Designing a comprehensive fault tree is an unwieldy task. Therefore, engineers focus on evaluating the smaller subsystems that make up the whole structure and then re-assemble these findings into one extensive and comprehensive fault tree.
  5. Drawn with typical logic gate icons. The path through tree linking an event and an originator in the tree is called the "Cut Set". The express plausible route through the tree from the identified fault to instigating event is called the "Minimal Cut Set."
  6. The root is at the top. An objectionable outcome is presumed as the root, which is often termed as the "Top event" of a logic tree. There must be a single "Top Event" and all troubles must ladder through from it. Subsequently, each circumstance that could trigger that outcome is tallied to the tree as a string of logic terms.
  7. Occasionally combined with Event Trees. An Event Tree pioneers from an unwanted source and tracks likely future situations up to a progression of ultimate results. When each latest incident is well thought-out, another knob on the tree is supplemented with a break up of odds of taking either offshoot. The prospect of a variety of ‘Top Events' rising from the initial event is obviously seen.
  8. Made of basic steps. Despite the variety of tactics used for constructing a fault tree, it could be summed up into five steps:
    • Identify the adverse occasion to examine
    • Acquire deep insight of the system
    • Assemble the fault tree
    • Appraise the fault tree
    • Contain the risks recognized

Fault tree analysis pictorially represents the associations of possible failures with the other probable events in the system. They are currently incorporated in software programs designed for engineers to study certain systems for faster analysis. Major companies employ it to provide quality service to their subscribers and superior products to their consumers.



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