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A fault tree diagram. Fault tree analysis (FTA) is a type of failure analysis in which an undesired state of a system is examined. 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 ...
The analysis is subjective to what the role being investigated entails. The headings of the three basic columns are: Job step, hazard and controls. A hazard is any factor that can cause damage to personnel, property or the environment (some companies include loss of production or downtime in the definition as well).
Layers of protection analysis (LOPA) is a technique for evaluating the hazards, risks and layers of protection associated with a system, such as a chemical process plant. . In terms of complexity and rigour LOPA lies between qualitative techniques such as hazard and operability studies (HAZOP) and quantitative techniques such as fault trees and event trees.
Fault tree analysis – Failure analysis system used in safety engineering and reliability engineering; Hazard and operability study (HAZOP) – Study of risks in a plan or operation; Layers of protection analysis (LOPA) – Technique for evaluating the hazards, risks and layers of protection of a system
A root cause analysis identifies the set of multiple causes that together might create a potential accident. Root cause techniques have been successfully borrowed from other disciplines and adapted to meet the needs of the system safety concept, most notably the tree structure from fault tree analysis, which was originally an engineering technique. [7]
Most spare tires are an example of this: They usually come with certain restrictions (e.g. a speed restriction) and lead to lower fuel economy. Another example is the "Safe Mode" found in most Windows operating systems. Fail-safe systems become safe when they cannot operate. Many medical systems fall into this category.
Influenza is an example of a biological hazard which affects a broad population of workers. [14] Exposure to toxins generated by insects, spiders, snakes, scorpions, [15] [16] [17] etc., require physical contact be made between the worker and the living organism.
Ishikawa Diagram: Takes into account environmental, human, methodical, and equipment causes that can lead to a problem. Using this model, an accident analyst could work backwards from the problem to find and mitigate potential causes. Fault Tree Analysis: Uses a tree type "yes/no" cause and effect analysis to determine potential causes of ...