Terry Ferguson said:That's what I was thinking. What is a coach for if not goal setting?
Well I don't expect a coach to set the goal, the athlete should do that (of course in consultation with the coach). The coach's job should be to determine what (and how long) will be required to achieve it or provide advice as to the attainability of the goal.
That said, I find the OP's question curious - wouldn't the goal be to achieve race oriented outcome(s) (e.g. promotion to next Cat, or placing/winning in specific events etc) and the likely power demands required simply be one factor in attaining and measuring progress towards that goal? I mean, experience, tactics and skills are key factors to be considered in race performance beyond power output (as incredibly useful as power is in predicting performance). If TT'ing, then equipment, set up etc also come strongly into play.
Can a coach really be expected to pick how much a rider can improve their power numbers - don't we all have different inherent abilities making that "performance ceiling" quite a sizeable variable between athletes?