4. Evaluate the effectiveness of measures taken

Corrective actions must be regularly monitored by the laboratory's quality manager, who measures their effectiveness over time. This process is an integral part of the PDCA continuous improvement cycle, where each action taken must be evaluated and, if necessary, readjusted.

The quality manager must regularly carry out quantified summaries of all non-conformities, whatever their origin, in order to assess the occurrence of non-conformities, the main typologies and the functions that identified the non-conformities.

These summaries should also make it possible to judge the "accuracy" of declarations by correlating the origins of non-conformities: internal audit and anomaly, internal audit and accreditation assessment, anomaly and customer complaint.

For example, the fact that no quality control anomalies have been...