Probability x Impact matrix

The Probability Impact Matrix is a tool that uses the agreed impact and probability values to categorise and determine the priority of a risk.

Impact
Probability   1 2 3 4 5
  Rare Unlikley Possible Likely Almost Certain
5 Extreme 5 10 15 20 25
4 High 4 8 12 16 20
3 Moderate 3 6 9 12 15
2 Low 2 4 6 8 10
1 Very low 1 2 3 4 5

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