Nothing kills quality as much as a misunderstanding during the bid phase. In addition to collecting and reviewing subcontractor bids, we do our own take-offs and share them with subs after obtaining their proposals. We do this to make sure each sub has included all areas, details and phases for their portion of work. If they've provided a lump sum proposal and discover a take-off discrepancy during installation it's too late too change course and someone has to compromise. We try to prevent this and at the same time we get to calculate and monitor price/unit and ensure fair pricing vs. expected quality.