Specifications for the Concrete Manufacturing Data Model :-
Hello, my name is Guilherme, i'm from brazil, and i'm here to ask some help.
First of all, your site, databaseanswers.org, is amazing, and is helping me a lot.
Now i need to build a database for an concrete industry. 
They have Manufacturing process which occurs only when a sale is performed, since it is not possible to 
store concrete. 
But they have feedstock on stock, and this is the part that confuses me.
I tried to connect some exemples but got nothing... Can you help me with this?
Awaiting response.
Guilherme K.