Table 21. Post-IQC impact assessment, end of run outside acceptable limits.

Recommended practice	Clear provisions: understandable for the staff responsible for applying them (adapted to the quality management system). Complete provisions: any type of method (quantitative/qualitative, automated/manual...), analyte (variable criticality), activity (continuous/discontinuous). Adaptable provisions: to all situations encountered.
Acceptable practice	No precise provisions, but correct practices and an impact study if necessary.
Unacceptable practice	No provision and no impact study in case of non-compliance with the IQC.
IQC – internal quality control.