# Commission Delegated Regulation (EU) 2020/2034 of 6 October 2020 supplementing Regulation (EU) No 376/2014 of the European Parliament and of the Council as regards the common European risk classification scheme (Text with EEA relevance), Division: STEP 2: SCORING OF THE SAFETY RISK WITHIN THE ERCS MATRIX

Extent: E+W+S+N.I.

The safety risk score is a two-digit value where the first digit corresponds to the alphabetic value resulting from the calculation of the severity of the occurrence (severity score A to X) and the second digit represents the numerical value from the calculation of the corresponding score of the occurrence (0 to 9).
The safety risk score shall be put into the ERCS matrix.
For each given safety risk score there is also a numerical equivalent score for aggregation and analysis purposes which is explained below under ‘Numerical equivalent score’.
The ERCS matrix reflects the safety risk score and the numerical associated figures of an occurrence as follows:
In addition to the safety risk score and to facilitate the determination of the urgency of the recommended action to be taken about the occurrence, the following three colours could be used in the ERCS matrix:
Colour
ERCS score
Meaning
RED
X0, X1, X2, S0, S1, S2, M0, M1, I0
High risk. Occurrences with the highest risk.
YELLOW
X3, X4, S3, S4, M2, M3, I1, I2, E0, E1
Elevated risk. Occurrences with intermediate risk
GREEN
X5 to X9, S5 to S9, M4 to M9, I3 to I9, E2 to E9.
Low risk occurrences
The green area of the matrix contains lower risk values. They provide data for in-depth analysis on safety related occurrences that could, either in isolation or in conjunction with other events, increase the risk values of such occurrences.
Numerical equivalent score
Each ERCS score is assigned a corresponding numerical value of risk magnitude to facilitate the aggregation and numerical analysis of multiple occurrences with an ERCS score:
ERCS Score
X9
X8
X7
X6
X5
X4
X3
X2
X1
X0
Corresponding numerical value
0,001
0,01
0,1
1
10
100
1000
10000
100000
1000000
ERCS Score
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
Corresponding numerical value
0,0005
0,005
0,05
0,5
5
50
500
5000
50000
500000
ERCS Score
M9
M8
M7
M6
M5
M4
M3
M2
M1
M0
Corresponding numerical value
0,0001
0,001
0,01
0,1
1
10
100
1000
10000
100000
ERCS Score
I9
I8
I7
I6
I5
I4
I3
I2
I1
I0
Corresponding numerical value
0,00001
0,0001
0,001
0,01
0,1
1
10
100
1000
10000
ERCS Score
E9
E8
E7
E6
E5
E4
E3
E2
E1
E0
Corresponding numerical value
0,000001
0,00001
0,0001
0,001
0,01
0,1
1
10
100
1000
Both column 10 and the row A in the matrix bear the value 0 as the corresponding numerical value.

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Source: https://www.legislation.gov.uk/eur/2020/2034/annex/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-2034/annex/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.