The Institute for Interlaboratory Studies delivers Proficiency Tests of the highest quality with clear reports and understandable z-score calculations for performance.
The Institute has implemented a quality system based on ISO/IEC 17043. Its protocol is followed in the execution of all iis PTs, accredited or not. The protocol can be found here.

The scope of our ISO/IEC 17043 accreditation can be found on the accreditation page.

The Institute for Interlaboratory Studies values their customer feedback. Please feel free to tell/suggest/explain anything to us concerning our PT program or products by sending an email to nl.iis@sgs.com or filling in the contact form on the contact page.

As part of SGS, the iis personnel follow the SGS policies, such as the Code of Integrity and policies for Data Privacy, Human Rights, Anti-Discrimination and Dignity at Work and Health & Safety. The policies are shared publicly by SGS and for example our Code of Integrity can be found here: SGS Code of Integrity

If you want to inform us of an official complaint, please send us an email on nl.iis@sgs.com. You will find our SGS Netherlands complaint procedure on the SGS website Quality page.