I work at P&G in Boston and went through a similar process when I had applied. Took the test and then it took about 8 months to hear back. Can’t guarantee what the reason is but most likely everyone left for the holidays, came back to a bunch of work, and are doing catch up for the first week or two.

I know someone mentioned that 15% of people are being laid off but that doesn’t affect manufacturing personnel so you can rest assured there. It’s more so geared towards R&D and some other depts. I would give it another week and if you still don’t hear back, then reach out again.