Hi guys,
I know this is an old post but, just my two cents worth here.....
Remember,when the "Big 3" got together to write the PPAP book, they had to take into account suppliers that make everything from nuts, bolts & washers - to - engine blocks, axels and transmissions! Just think about the diversity of the products and processes. I strongly suggest that you establish a repore with your customers and come to an informed agreement about such issues. After all, do we all do PPAP's because we want to or because we HAVE TO. If this is a customer requirement, why not let them tell you (with your input) what they want to see.
Sorry if I rambled....something struck a cord!