hi

Here an example of my sheet metal workflow for parametrics parts

The workfloor is :

1 - Simple 2D part's drawing . ( complex part's can be import from SOLVESPACE )
2 - Part's extrusion
3 - Part's 3D connection/assembly with junctions .
4 - Final boolean union
5 - Layout with Make2D4Views function
6 - 3D part's export in STEP , SKP ...
7 - Layout export in PDF

i hope it could help you
have a nice day

Chri