K
Hi, Krink! I used to live in Rockford, BTW.
Ultimately, the Program Manger is responsible but in most Tier I there is an APQP Engineering function that is responsible for pulling the actual PPAP documents together for review, coordination, organization, and ultimate submission to the customer at all phases from Pre-production through final full PPAP and hand-off to plant Quality for Production. The hand-off process generally lasts from 1-6 months depending on launch success, product complexity, and late introduced changes.
Best of luck!