Answer by Isaac Gaetz:
Design is an iterative process, the trick is to strike a balance between depth of design and breadth of design. You have to make some decisions before you can move forward with the design, but if you go into too much depth early on, you’ll end up having to rework or throw out much of your work. It helps to have good intuition about design, so, knowing the approximate depth of the structure and beam spacing will be needed early, but having the final details will come much later in the process. Drawings will proceed similarly, you’ll need to develop design and schematic drawings earlier than construction level documents. Initially the idea is produce drawings that can convey the concept to various stake holders, who may not even be engineers or contractors.