Further to what Steve said.....
"Manufacturing" is an overgeneralization. You should decide specifically
what you want the DB to do track.
If you want it all (Products, Bills of Material, Work Orders, Orders,
automatic inventory modifications based on what the instance of manufacturing
used & created, purchasing, inventory control, then you have something that
is extremely complicated from both a database and implementation side, and
(assuming that you company has not used such before) which also typically
requires creating and changing many of the ways that your company operates.
Such is actually full Enterprise software, and more complicated than anythign
I've seen implemented / handled in these forums.
Alternatively, you might start simple. Create a "Products" or "Parts"
table with all of the fields that are useful to you, and created and enter
part/product numbers for such if you haven't already.