Hi David
In manufacturing you don't use Resources for recording costs and quantities, you use Machine centers, however they work in pretty much the same way
If you dont specifically need to allocate overhead costs and maintain a sub ledger then i would suggest that you rather add a dimension for employee and allocate this to the output lines, then use the dimension to report on the output per employee afterwards
I have done an integration using machine and work centers and it can be pretty complicated, so i would suggest that you try and use the Dimensions rather if you can.
Shout if you have any other questions
Cheers
Neville