Production Part Approval Process (PPAP) is used in the automotive supply chain for establishing confidence in component suppliers and their production processes. Actual measurements are taken of the parts produced and are used to complete the various test sheets of PPAP.

Read more about PPAP here:
https://en.wikipedia.org/wiki/Production_part_approval_process

Advanced product quality planning (or APQP) is a framework of procedures and techniques used to develop products in industry, particularly the automotive industry. It is quite similar to the concept of Design for Six Sigma (DFSS).

Read more about APQP here:
https://en.wikipedia.org/wiki/Advanced_product_quality_planning

Design for Six Sigma (DFSS) is a business-process management method related to traditional Six Sigma. It is used in many industries, like finance, marketing, basic engineering, process industries, waste management, and electronics.

Read more about DFSS here:
https://en.wikipedia.org/wiki/Design_for_Six_Sigma