by the task / job, not by the skill of the worker. The job has to be done and I would pay Fred differently, but the customer should not have to eat the cost of my inefficiency sending an "over-skilled" (my term) employee. Likewise the customer should not suffer if I send Joe and he fails to complete the task because he didn't have the skill set. That should be my / your job as a manager to determine.

My .02,
Jerry