Division of labour method.

Whoever gives the command is what the program follows. If part of the command is from one player, then only that one is carried out with their time.

So this only works for selected fabber when you issue your build command?
This would need a toggle( or hot key) otherwise could be annoying when you try to rush up catalyst or halley and it splits you fabbers instead of focus building one thing at a time.

Like others have said maybe try making it into a mod.

Like i said. Read step 2.

So dose it only work for selected fabbers or idle fabbers or nearby fabbers?
Maybe I'm missing something here.

Well, when you select fabbers and give them orders, the computer divides them up like this.