Do those two sets of experts talk with each other very much?
It depends on the context. Design documents serve as working embodiment of the emerging design among those who work on it. Any time you have group design, the design must be kept in an external form (i.e., not locked up in someone's head.)
Design documents -- fabrication and assembly drawings in particular -- serve to communicate appropriate information to manufacturers. Hence at a certain point a design is "released to manufacturing." The documents in that case are expected to be self-explanatory, hence must follow appropriate graphical and written standards. In my case the drawings often go to manufacturers in different companies and in different countries, where interaction is not always possible.
If so, who is responsible for being sure they don't spend too much time talking, revising the design?
Principal engineers and engineering managers. Engineering management is the art of managing expectations, schedules, budget, and design quality in a process Henry Petroski calls "satisficing." The variables that affect design activity are naturally in conflict.
By any chance, do you happen to know who Jack Barkla is? At that, I suppose I might as well ask if you've ever been in Minneapolis.
No on both counts, unfortunately.
I saw a corner of Utah once, but have never been there.
Utah has some very famous corners.
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