Quality infrastructure (QI) systems differ between countries.

Germany can look back on a particularly long history of QI development. The predecessor of the PTB was the first National Metrology Institute (NMI) globally, and the German DIN is one of the pioneering National Standards Bodies (NSB). Accreditation was later introduced and, during European integration, merged into one National Accreditation Body (NAB) carrying the acronym DAkkS in Germany. However, the term “quality infrastructure” is a relatively new terminology in Germany.