my 2¢ ...
I'm, in a way, a 'champion' for long distance working - but with some very important caveats
As to production drawings specifically I look at it this way:
- if I have someone doing them ideally I would like them to be physically next to me
if not in easy earshot
if not on the same floor of the same building
or if a freelancer, with regular visits and a quick phone call away
best with a good 'feel' for the construction culture for where the building is going up
not to mention knowledge (and lessons from past agonising mistakes) with local codes, construction details etc
definitely speaking the same language
so, among other obvious things, they can occasionally pick up the phone to a supplier/manufacturer/contractor
and don't underestimate good (appropriate) phone manner with all of these people
... so you can see that if you outsource your drawings to China, India or Pakistan (I have flirted with the latter two) ... the scorecard on the list above will be very low
I know there are people out there who do it successfully, so I would love to hear from them - but this aspect of 'long distance' is not for me
... ps - I just realised that I didn't mention cost once. Maybe there is a reason for that. Cost is not only measured today, for one category of personnel - but also in your (more expensive) time, and long term