The RPN or Risk Priority Number is a quantitative assessment of risk that is assigned to a process or product function as part of a failure modes & effects analysis. Individuals or teams assign the RPN based on an established criteria measuring the severity of impact, frequency of occurrence and the likelihood of detection.
To calculate the Risk Priority Number you can multiply the probability by the severity by the likelihood of the failure escaping detection. The answer of these three numbers multiplied is your RPN number. It should be noted that potential failures with a high probability of occurrence, a high degree of severity and a low chance of being detected would naturally have the most risk. As such the RPN would be the highest. Once the RPN is established it is then ranked to see which Failure in the series would require some type of corrective action first.
A local distribution company wants to calculate the risk priority number for 3 potential damages to their inventory at a local distribution center. The team has assigned rankings of one to 5 for each of the three categories: probability of occurrence, severity of failure and probability of not being detected. 5 is the worst. They choose three possible failures shown above. The scores are also shown. Which of these three options scored the highest RPN?
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