QD83 replaces the former Quality Directives of QR83 (edition 2011) from ZF and GSQM from TRW.
QD83 Edition 2018 was published on November 24, 2017 and has been effective since January 1st, 2018.
The following QD83 Sanctioned Interpretations were determined, approved and published by ZF.
They are an official part of QD83 2018. They contain either necessary corrections of the original text or further explanations, but no additional requirements.
Unless otherwise indicated, the QD83 Sanctioned Interpretations are applicable upon publication.