Division 5.10.1 GeneralF1

The verification of in-service conformity shall rely on a statistical method following the general principles of sequential sampling for inspection by attributes. The minimum sample size for a pass result is three vehicles, and the maximum cumulative sample size is ten vehicles for the Type 1 and RDE tests.

For the Type 4 and Type 6 tests a simplified method may be used, where the sample shall consist of three vehicles and shall be considered a fail if all three vehicles fail to pass the test, and a pass if all three vehicles pass the test. In cases where two out of three passed or failed, the type approval authority may decide to conduct further tests or proceed with accessing the compliance in accordance with point 6.1.

Test results shall not be multiplied by deterioration factors.

For vehicles that have a Declared Maximum RDE Values reported in point 48.2 of the Certificate of Conformity, as described in F2Annex VIII to Commission Implementing Regulation (EU) 2020/683 which is lower than the emission limits set out in Annex I to Regulation (EC) No 715/2007, the conformity shall be checked both against the Declared Maximum RDE Value increased by the margin set out in point 2.1.1 of Annex IIIA and the not-to-exceed limit set out in in section 2.1. of that Annex. If the sample is found not to conform with the Declared Maximum RDE Values increased by the applicable measurement uncertainty margin, but pass with the not-to-exceed limit, the granting type approval authority shall require the manufacturer to take corrective actions.

Prior to the performance of the first ISC test, the manufacturer, accredited laboratory or technical service (‘party’) shall notify the intent of performing in-service conformity testing of a given vehicle family to the granting type approval authority. Upon this notification, the granting type approval authority shall open a new statistical folder to process the results for each relevant combination of the following parameters for that particular party/or that pool of parties: vehicle family, emissions test type and pollutant. Separate statistical procedures shall be opened for each relevant combination of those parameters.

The granting type approval authority shall incorporate in each statistical folder only the results provided by the relevant party. The granting type approval authority shall keep a record of the number of tests performed, the number of failed and passed tests and other necessary data to support the statistical procedure.

Whereas more than one statistical procedure can be open at the same time for a given combination of test type and vehicle family, a party shall only be allowed to provide test results to one open statistical procedure for a given combination of test type and vehicle family. Each test shall be reported only once and all tests (valid, not valid, fail or pass, etc.) shall be reported.

Each ISC statistical procedure shall remain open until an outcome is reached when the statistical procedure arrives to a pass or fail decision for the sample in accordance point 5.10.5. However, if an outcome is not reached within 12 months of the opening of a statistical folder, the granting type approval authority shall close the statistical folder unless it decides to complete testing for that statistical folder within the following 6 months.