The idea about placing furniture before it's available might be too much of an abstraction in comparison to the current system were you pick the specific item to be placed. True, often you might not actually care about which darn Gabbro floodgate is placed, but it's one of the details that makes the charm of DF I guess.
It might be an abstraction, but I think most people that go to the Site a Building menu want to build/place something, and it kinda sucks when you think you have something in stock but then you are greeted with something like "Needs thrones."
When only a handful of options allow you to build something without first having it in stock I think it would be faster to allow the menu to at least automate it a bit more so you don't waste your time. Even if you couldn't designate placement beforehand it'd be nice if it at least took you to that specific Workshop so you wouldn't have to backtrack so much.
"Site a Building" Mock-upYou find out you don't have an armor stand:
You hit b, it gives you a menu of built Workshops that can construct it:
You select the shop and takes you to the Workshops tasks/preferences and highlights what you wanted:
Even if there wasn't a way to designate the future item, it'd still be handy, just because you wouldn't have to leave the Site a Building menu and navigate to the Workshop, etc. You'd still have to go back into the Site a Building menu in this case, but it'd take out three or four steps that might lead to frustration.
This is a nice segue to the organization of Workshops in general...
WorkshopsI think having stuff like "Construct wooden...", or "Construct rock..." when you're already in a Carpenter's/Mason's Workshop is redundant, and just takes up space. Something like this might be better, with again, categories:
Page 1 of Carpenter's Workshop
Page 2 of Carpenter's Workshop
I also think separating "*/" would be a good idea for the menus that utilize it, for awhile I didn't even know I could cycle through pages.
Other Workshops could be organized in the same way. the Mason's Workshop could look something like this:
Furniture - Armor Stand, Throne, Door, Cabinet, Table, Statue, Weapon Rack, Coffer
Agriculture - Quern, Millstone
Maintenance - Floodgate, Hatch Cover, Grate, Blocks, Coffin
I guess the big thing to take away in this thread is that organizing things into categories, and staying consistent with them through various menus, would go a long way, haha.