Combinatorial Manufacturing Methods means utilize more than just one manufacturing method to create a single product.
Fabrication techniques are often utilized in the execution of combinatorial products, oftentimes including welding processes
Example:
A Generatively-Designed outcome has a cylindrical feature on one end of the part, a rectangular feature on another end of the part, and a complex geometry on another end of the part.
The cylindrical feature gets made on a lathe
The rectangular feature gets made on a mill
The complex geometry feature gets made on a 3D Printer
The 3 pieces mentioned above get welded together at the end into a single, solid object