Contractors build things and that comes down to the men and women in the field. They are the ones adding the value to the raw materials and that is ultimately what the customer is paying for.
Few things will improve operational execution for contractors faster than a rigorous project review and projection process. Projections are really just continuous planning, learning, refining and adjusting.
The wins of a great incentive program tend to be the same for both union and open shop employers. The wins not only include retention of the employees that you already have, but recruitment of new employees.