For at opnå bedre repeterbarhed og reproducerbarhed for undersøgelsesresultaterne, anbefales det at parameteren fa er således, at: 0,93 ≤ fa ≤ 1,07.
For better repeatability and reproducibility of the test results, it is recommended that the parameter fa be such that: 0,93 ≤ fa ≤ 1,07.