Paragraph 13 Moving weighted averaging process for the annual assessment of achievement of NRVsF1

For each of the risk categories to which the MWA is applied for carrying out, in each year Y (starting from Y = 2010), the assessment steps described in paragraphs 9 to 12, the following phases must be applied for calculating the MWA_Y

(a)

calculation of the annual observations OBS_i returned by the corresponding indicators in paragraph 14 after providing as input the relevant data for the relevant years (the index i takes the values as defined in the formula in sub paragraph (e));

(b)

calculation of the 5-year average (AV) of annual observation OBS_i;

(c)

calculation of the absolute value of the difference ABSDIFF_i between each annual observation OBS_i and the AV. If ABSDIFF_i < 0.01 * AV, the ABSDIFF_i is attributed a constant value equal to 0.01 * AV; M1

(d)

calculation of the weight W_i by taking the inverse of ABSDIFF_i;

(e)

calculation of the MWA_Y as follows—

M W A Y_{Y} = \frac{\sum_{i = x}^{N} W_{i} \times O B S_{i}}{\sum_{i = x}^{N} W_{i}}

where i is a natural number and x = Y – 6; N = Y – 2.

Annotations

Textual amendments

F1: Schs. 8-11 inserted (31.12.2020) by The Rail Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/837), reg. 1, Sch. para. 1 (as amended in Sch. 11 paras. 14, 16, 17 by S.I. 2019/1310, reg. 1(2)(c), Sch. 1 paras. 2, 3, 4); 2020 c. 1, Sch. 5 para. 1(1)

Marginal citations

M1: Asterisks in this paragraph have been used to indicate multiplication signs.