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Figure 2: Risk matrix chart
2.6.3 Risk classification
Based on the assessment of the grade of likelihood and impact, a score is calculated for each risk by multiplying the two numbers. This resulting score is then used to decide the classification of the risk based on the matrix shown in figure 2.
Each risk will be allocated a classification based on its score as follows:
• High: 12 or more • Medium: five to ten inclusive • Low: One to four inclusive
[Note – you may decide to change the definition of high, medium and low classifications based on your general risk appetite e.g. you may decide that only risks with a score of 16 or more will be classified as high.]
happening? RISK LIKELIHOOD: What are the chances of the risk event
ALMOST CERTAIN 5
LIKELY 4
MODERATE 3
UNLIKELY 2
RARE 1
RISK IMPACT: How severe could the consequences be if the risk event happened?
INSIGNIFICANT 1 MINOR 2 SIGNIFICANT 3 MAJOR 4 SEVERE 5
MEDIUM 5
LOW 4
LOW 3
LOW 2
LOW 1 MEDIUM 10
MEDIUM 8
MEDIUM 6
LOW 4
LOW 2 HIGH 15
HIGH 12
MEDIUM 9
MEDIUM 6
LOW 3 HIGH 20
HIGH 16
HIGH 12
MEDIUM 8
LOW 4 HIGH 25
HIGH 20
HIGH 15
MEDIUM 10
MEDIUM 5
Figure 2: Risk matrix chart
The classification of each risk will be recorded as input to the risk evaluation stage of the process.