JLCDFM (design for manufacturing) is an interesting tool. JLCDFM allows checking a board before ordering.

But smallest trace width, trace spacing, via size are not the same in economic pcb assembly and standard pcb assembly.

How can I test a board is ready for economic pcb assembly? Or whether standard assembly is required?

Maybe what would improve JLCDFM would be a button to choose "economic assembly" or "standard assembly".