Sample 7+7 Risk Assessment Matrix
In health and Safety today the most popular risk assessment methods multiple the likelihood by the consequences, examples of this being the 3x3, 4x4 and 5x5 matrices. There is, however, another risk rating method that adds these values when calculating risk rating and helps in overcoming some of the inconsistencies and inaccuracies that can be produced using these multiplication methods.
The 7+7 method can be used where data is available or a good degree of judgement can be applied to estimates of the frequency and consequences of each hazardous event. This semi-quantitative risk ranking approach allows for a greater level of accuracy and consistency in the risk estimates that can be obtained.
Note: The size of the matrix and the factor difference in frequency and consequence rankings can be altered to give the best ranges to suit a particular organisation's operation.
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