When FDA published its guidance document on process validation in 2011 it re-affirmed the importance of process development. This sounds like a lot of extra work for people who are barely managing IQOQPQ.
FDA had forced the issue a decade earlier with medical devices and design control. Now they are telling manufacturers of drugs and biologicals that the DESIGN of their process is just as important as the qualification of their equipment. But simply documenting Stage 1 of Process Validation is not enough.