Risk Matrix

There are any number of different risk matrices.  They range from a 3*3 matrix with risk values of H, M and L.  There is a 4*4 matrix with scores from 1 to 6, as well as a 5*5 with a range of scores. 

Below id just one example of a 5*5 matrix as well as a description of what the values mean.  

A) Almost certain; will occur at least once per month

B) Likely; will occur at least once per month to once per year.

C) Occasionally; Expected to occur at least 1 year to 10 years

D) Unlikely; Occurs every 10 years to 100 years

E) Rare; Occurs less than once every 100 years

An example of a 4*4 Matrix.  In this example numerical values have been replaced with risk descriptions.

An example of a 3*3 matrix.  This size matrix gives results of High, Medium or Low