[vrinsd]

I agree with every comment robomartin has posted on this thread.

I'll add: I HAVE worked on schematic designs with 10-20 people working on an overall schematic design at the same time. Usually one or more engineers own some sub-section of the design ; i.e. for a mobile device, one or a few people own the "power" part of the schematic, the camera team owns the camera portion(s) of the schematic, etc.

Mentor (DxDesigner / Design Capture) and Cadence (Concept) support this flow, but with the oddly more popular but OrCad this can be a nightmare.