In my many years of working in the field of risk management, I've come across a wide variety of ways that different organizations and people use to prioritize risks.  These are commonly referred to as "Risk Scoring Methodologies".  In SimpleRisk, we currently support six different risk scoring methodologies:

Anyone who has studied for the CISSP exam knows that the "textbook" definition of risk scoring is Risk = Likelihood x Impact.  Typically, the Likelihood and Impact values are represented by ordinal numbers, which are mapped to some qualified value.  We then use a matrix to represent the intersection of these values in order to obtain a final risk score.  Some organizations will use a 3x3 matrix.  Some may use a 10x10.  Here at SimpleRisk, we've seen just about every combination you could imagine in-between, but the most common scenario is a matrix with five Likelihood values and five Impact

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