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Risk Assessment Matrix Comparison Chart:


Comparison of 3 x 3, 5 x 5 and 7 + 7 risk assessment matrix charts

Risk Rating

Risk Level

Tolerability

3x3

5x5

7+7



1 to 2

1 to 8

2 to 5

Low

Risk broadly acceptable

3 to 5

9 to 15

6 to 8

Medium

Risk in the 'ALARP' region


6 to 9

16 to 25

9 to 14

High

Risk unacceptable

Note: The matrices are suggested for health and safety risk assessment guidance and may not suit all organisations.





3 x 3 Risk Matrix


LIKELIHOOD


Likely

Medium

Risk

High

Risk

Extreme

Risk



Unlikely

Low

Risk

Medium

Risk

High

Risk



Highly Unlikely

Insignificant Risk

Low

Risk

Medium

Risk




Slightly Harmful

Harmful

Extremely Harmful




CONSEQUENCES




5 x 5 Risk Matrix


LIKELIHOOD


5

5

10

15

20

25



4

4

8

12

16

20



3

3

6

9

12

15



2

2

4

6

8

10



1

1

2

3

4

5




1

2

3

4

5




CONSEQUENCES





7 + 7 Risk Matrix





1

2

3

4

5

6

7


FREQUENCY


7

8

9

10

11

12

13

14



6

7

8

9

10

11

12

13



5

6

7

8

9

10

11

12



4

5

6

7

8

9

10

11



3

4

5

6

7

8

9

10



2

3

4

5

6

7

8

9



1

2

3

4

5

6

7

8





CONSEQUENCES

Extended Comparison of 3 x 3, 4 x 4, 5 x 5 and 7 + 7 risk assessment matrix charts

Occupational Health and Safety Risk Assessment

Risk Assessment Risk Matrix Comparisons

www.onsafelines.com : ALARP Triangle
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26th Feb 2014