Sit down with your plumbers and go through a couple of plans in detail. You’ll find it’s rare that all drain locations, feeds, sumps, stacks, and plumb walls are precisely identified on the plans with exact locations. Every single missing measurement means more work, more time, and a greater chance for errors, omissions, and rework. This might range from $100 in buried time to $1,000 to bust out a floor drain and move it. The time spent up front to get this right is a pure investment, never an expense.
Links:
[1] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips
[2] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-0
[3] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-1
[4] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-2
[5] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-3
[6] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-4
[7] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-6
[8] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-7
[9] http://www.housingzone.com/hz/article/top-10-waste-busting-profit-boosting-tips-8