You win the job on an estimate and a GC date, before the drawings are done. You don't know how many levels and areas you're building, or what goes in each one, until coordination and detailing dig in.

Building Swell lets you set up your work breakdown structure on day one and keep adding to it. Work out each level through design and detailing, add areas and systems as they're found, then drag to resequence and duplicate levels that repeat. The shop starts on what's ready while the rest is still in detailing.