Outsourced processes
We also manufacture chemicals and have many bits "outsourced" as our scope often is constrained to discrete manufacturing units who get services (that are critical to delivery of customer requirements) from both internal and external suppliers.
We thus make quite a great play of our "boundary management" issues, with reference as Claes highlights to clause 4.1, to demonstrate that we've told the supplier what we want and that we've assessed that we're getting a satisfactory service.
I've often agreed phraseology for registrations such as "the supply of products to the ink market"
Speaking as a customer, I'm struggling to find reasons to be concerned about if my supplier has registered manufacturing activities - I'm really only concerned that my requirements are delivered. If that supplier has outsourced manufacturing, I'd simply expect them to have a system that makes sure my needs are still being met by their subcontractor.
Cheers, Al.