Mike Testro wrote:
"...(Y)ou will need strong supervision which has to be paid a good rate outside the tonnage money."
Put that in flashing neon lights. Any time that you add incentives for speed, you risk sacrificing quality unless you invest some of the value and time generated back into supervision and quality checks. Just like in T20 cricket -- faster run rate means more risk and more wickets.
Of course, if you've generated enough time savings, then you have the time to reinvest in supervision and quality checks.
One thing I would add is to ensure that the incentives you're paying for faster performance is on the critical path work and is based in data about the work's drag cost. There is little point in speeding up work to just increase a noncritical path's float or to pay more in speed incentives than the value of the time saved.
Fraternally in project management,
Steve the Bajan