> Who is Vendor? Is PCB fabhouse meant? Or the designer? Yes, the fab house.
> If I am designed a board that is meant to be portable (i. e. anyone > in the world can send it to his local fabhouse) what should I load > into vendor manufacturing rules? That's a tricky one. I would say, do a survey of fab houses and find the most strict set of drills and stick to those. Many fab houses don't limit the drill sizes; they have a full rack. The ones that do limit might use the same limited set. Design for the maximum line/space rules. The end user may have to let the fab round the hole size up to their drill set even so.
