It will depend on:
- level of submission (of PPAP, not of your company being submissive to customer ... ha, ha)
- complexity of product (e.g., how much inspection required, technology/knowledge/skills to do it, number of special characteristics, whether it involves appearance items, ...)
- whether your customer uses PPAP appropriately (e.g., provides sufficient lead time, is really looking for product issues rather than nit-picky documentation issues)