# Directive 2014/47/EU of the European Parliament and of the Council of 3 April 2014 on the technical roadside inspection of the roadworthiness of commercial vehicles circulating in the Union and repealing Directive 2000/30/EC (Text with EEA relevance), Division 3: The risk rating shall be calculated using the following formulas:

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

(a) The formula for the overall risk rating:
RR = D Y1 × 3 + D Y2 × 2 + D Y3 × 1 #C Y1 + #C Y2 + #C Y3 Where
RR overall risk rating score
DYi total for the defects in year 1, 2, 3
DY1 #DD × 40 + #MaD × 10 + #MiD × 1 in year 1
#… number of…
DD dangerous deficiencies
MaD major deficiencies
MiD minor deficiencies
C checks (technical roadside inspections or periodic and voluntary roadworthiness tests) in year 1, 2, 3
(b) The formula for the annual risk rating:
AR = #DD × 40 + #MaD × 10 + #MiD × 1 #C Where
AR annual risk score
#… number of…
DD dangerous deficiencies
MaD major deficiencies
MiD minor deficiencies
C checks (technical roadside inspections or periodic and voluntary roadworthiness tests)
The annual risk shall be used to assess the evolution of an undertaking over the years.
The classification of undertakings (vehicles) based on the overall risk rating shall be performed in such a way that the following distribution within the listed undertakings (vehicles) is reached:
< 30 % low risk
30-80 % medium risk
> 80 % high risk.

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Source: https://www.legislation.gov.uk/eudr/2014/47/annex/I/division/3 (the official version)
Page: https://openlegislation.uk/eu-directive-2014-47/annex-I/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.