It’s not uncommon for a company to have two suppliers of a starting material. They’re now going to validate the process and they want to make sure that their validation encompasses material from both suppliers. What do they need to consider.

Assuming that the company has done some preliminary work to show that their two suppliers are
delivering material to the same specification, and that both will work in the company’s API
process, it would be prudent to use material from both suppliers in their demonstration batches.
With the criteria that the starting materials from both suppliers met the same specifications and all
quality attributes are satisfactorily met for the API, this should support he use of either supplier.