From a guy who's worked in design and production, here's what I'd be asking you:
Graphics department:
- What color(s) vinyl are we using (never leave it up to the production staff to choose or you end up with no leg to stand on when the customer says "that's not the right red/yellow/whatever")?
CNC department:
- What thickness aluminum for the channel letter backers (yes, there are usually standards, but when they aren't noted, it's a red flag)?
- What thickness acrylic for the channel letter faces (again, standards)?
- What color red acrylic for the channel letters (again, make the customer choose)?
- What thickness aluminum for the routed faces of the monuments (again, standards)?
- What thickness acrylic for the routed faces of the monuments (again, standards)?
Fabrication department:
- What do you want the frame of the monument built from? Angle? Tubing? Aluminum? Steel?
- Do the monuments mount to existing poles, or do they need their own? If existing, does it need sleeves or plate mounting? If new, what size (normally based on wind load requirements)?
- What thickness aluminum for the routed faces of the monuments (again, standards)?
Installation department: Not always included on drawings, but definitely something to be addressed (preferably by the salesperson or your job manager so the info is included)
- What do we need to install the channel letters: Ladders? Scissor lift? Boom lift? Crane? It would be helpful if you mocked up the channel letters at their install locations so that could be addressed.
- What are we going to have to do/what equipment do we need to install the monuments: Dig? Set steel? Do we need utilities marked? Are we going to have to bust up the sidewalk? Is there power run to the sites or will it require additional trips after the signs are installed.
My .02.