Can anyone tell me what is gained by specifying "Fabricate to Mil-PRF-31032
vs. IPC-xxx?"  Is a  fabrication specification even required when purchasing
a multi-layer PWB at all?   Will all PWB manufactures give some minimum
fabrication requirement if none is stated on the drawing or in the purchase
order, or is it  always BUYER BEWARE??

Thanks for your assistance.

Tony Arrigo