The standard ensures that EQA-Schemes are carried out according to defined quality criteria in order to guarantee reliable and comparable results.

Central requirements are:

– Impartiality – the provider must act independently of participants

– Technical expertise – proven expertise in the areas offered

– Consistency – uniform implementation of all proficiency testing programmes

– Transparency – clear communication of criteria and methods

– Documentation – complete documentation of all processes

These requirements are crucial for objectively assessing the performance of laboratories and ensuring that their results are valid.