1. Do you consider that IATF 16949 is sufficient to evaluate the QMSs of OEMs?
Yes, IATF 16949:2016 standard is sufficient for customer-specific requirements evaluation due to the IATF 16949: 2016 standard addresses customer-specific requirements at many points.
2. If so, why are there supplementary audits like VDA6.3 or ASES of Renault-Nissan? Thank you.
As you know, customer-specific requirement means automotive customer expectations. This issue is addressed in Article 4.3.2 of the IATF 16949: 2016 standard.
In addition, in annex B, section’’ Bibliography-supplemental automotive’’ of the same standard, customer-specific requirements of all OEM customers are shown and explained.
For example, if the organization's customer is VW, in this case, it is stated that it should comply with special requirements such as VDA 6.3-6.4-6.5.
For more information, please read the following articles: