PPAP is the industry standard that defines the production part approval process and demonstrates engineering design records and specification requirements are achieved by the supplier's manufacturing process. The PPAP guideline provides the minimum expectations a supplier must document and submit to a customer for approval to ship production part quantities. NOTE: The PPAP 4th edition, 2nd Printing includes the corrections from the PPAP errata sheet dated July 19, 2006. The PPAP 4th edition, 2nd Printing, does not contain any new PPAP requirements; therefore, PPAP 4th edition and PPAP 4th edition, 2nd Printing are considered technically equivalent and valid editions. https://www.aiag.org/staticcontent/files/PPAP4ErrataSheet_July06.pdf