First of all in the handboock of the Instrument or the method-instruction manual. This is then the CV of the reagent manufacturer. Then of course in the actual quality control of the laboratory.

In addition, the german medical doctors association (Bundesärztekammer) has published the RiliBäk (Richtlinien der Bundesärzte-Kammer) containing corresponding maximal CVs for most of the important analytes in serum, urine, CSF. These cut-offs are meanwhile the "bible" of all clinical laboratories in Germany and are additionally supported by official regulations.

The corresponding publications may be found in the Internet via Rilibäk.

Sighart Golf

CCV for each analyte is the lowest CV obtained form determinations of analyte during first two years of the external quality assessment.