Probability/consequence class

1

2

3

4

5

Failure probability

<3.0E−4

3.0E−6 - 1.0E−4

1.0E−4 - 3.0E−3

3.0E−3 - 1.0E−1

>1.0E−1

Socio-economic cost (MSEK)^*

<6

6 - 35

35 - 150

150 - 650

>650