Craig DeFinis enjoys watching a craftsperson lose 15 minutes of work time about as much as he likes discovering that he just left his wallet in the back seat of a taxi. As the owner of Pittsburgh plumbing and HVAC contractor DeFinis Mechanical Contractors, he grants his union plumbers a quarter-hour morning break, even though his contract doesn’t require it, and hopes the workers don’t stretch it the way the half-hour lunch break sometimes goes to 45 minutes. Because each worker costs about $60 an hour in wages and benefits, extra minutes add up over the long run. “Multiply that by eight guys, five days a week, for six months—that’s a lot of money,” he says.

DeFinis does more than gripe about breaks. He holds meetings with foremen every week to ensure timely delivery of tools, materials and information to his crews. Further, he stays alert to errors in the plans his crews work from. “Some engineers are better than others,” he says.