Division 5.10.4 Treatment of OutliersF1

The presence of outlying results in the sample statistical procedure may lead to a ‘fail’ outcome in accordance with the procedures described below:

Outliers shall be categorised as intermediate or extreme.

An emissions test result shall be considered as an intermediate outlier if it is equal or greater than 1,3 times the applicable emission limit. The presence of two such outliers in a sample shall lead to a fail of the sample.

An emissions result shall be considered as an extreme outlier if it is equal or greater than 2,5 times the applicable emission limit. The presence of one such outlier in a sample shall lead to a fail of the sample. In such case, the plate number of the vehicle shall be communicated to the manufacturer and to the granting type approval authority. This possibility shall be communicated to the vehicle owners before testing.