Document ID: chunk:federal_register_of_legislation:F2024L00443:reg:3:p14
Version: federal_register_of_legislation:F2024L00443
Segment Type: reg
Provision Reference: reg 3 (pt 14/14)
Character Range: 123005–124832

count of passed results 'p' and the count of failed results 'f';
(c) compute the number of extreme and intermediate outliers in the sample in accordance with paragraph 5.10.4.;
(d) check whether a decision is reached with the procedure described below.
The decision depends on the cumulative sample size 'n', the passed and failed result counts 'p' and 'f', as well as the number of intermediate and/or extreme outliers in the sample. For the decision on a pass/fail of an ISC sample the granting type approval authority shall use the decision chart in Figure 4/2. The charts indicate the decision to be taken for a given cumulative sample size 'n' and failed count result 'f'.
Two decisions are possible for a statistical procedure for a given combination of vehicle family, emissions test type and pollutant:
'Sample pass' outcome shall be reached when the applicable decision chart from Figure 4/2 gives a 'PASS' outcome for the current cumulative sample size 'n' and the count of failed results 'f'.
'Sample fail' decision shall be reached, for a given cumulative sample size 'n', when at least one of the following conditions is fulfilled:
(a) the applicable decision chart from Figure 4/2 gives a 'FAIL' decision for the current cumulative sample size 'n' and the count of failed results 'f';
(b) there are two "FAIL" decisions with intermediate outliers;
(c) there is one "FAIL" decision with an extreme outlier.
If no decision is reached, the statistical procedure shall remain open and further results shall be incorporated into it until a decision is reached or the procedure is closed in accordance with paragraph 5.10.1.
Figure 4/2
Decision chart for the statistical procedure for vehicles (where 'UND' means undecided)
Failed result count f  10                                                                  FAIL