Hm. The truth is, they don't work. Kinda lazy, in fact
Almost all the designers use CAD to make their designs. It is a small team, so if I said 4 people can do CAD, that's almost everyone...
On a different team with which I am familiar, the small CAD team follows the designers around with rulers, and CAD things
after they are built
. I know this is bass-ackwards, and I am sure they know it too (I have told them enough!), but for some reason they use CAD to document what's already fabricated.
In fact, that's a major reason they do not yet have any CNC machinery: Can't fab what ain't designed.