Process safety analysis ranking methods

The answer is to correlate the hazard severity and probability or likelihood and create a ranking scheme. Different safety analysis techniques handle this question in different ways. The hazard analysis standard is Mil-Std-882 System Safety Program Requirements (U.S. Department of Defense, 2012). The ranking method is a very easy, three-step process ... 

The traditional FMEA has been a well-accepted safety analysis method, however, it suffers from several weaknesses. One of the critically debated weaknesses, is the method that the traditional FMEA employs to achieve a risk ranking. The purpose of ranking risk in order of importance is to assign the limited resources to the most serious risk items. Traditional FMEA uses an RPN to evaluate the risk level of a component or process. The RPN is obtained by finding the multiplication of three factors, which are the probability of failure (5/), the severity of the failure S) and the probability of not detecting the failure (Sj). Representing this mathematically will give ... 

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