As for technical competence, the following topics are especially important:
* sampling
* traceability of measurement result
* validation of measurement procedure
* measurement uncertainty
* participation in interlaboratory comparisons
* internal quality control.
As it is important to have globally harmonised approach to the above-mentioned topics, various training and teaching material have been developed at the European level, as to support implementation e.g. by EURACHEM and by TrainMiC.