In a large commercial vineyard, what is the most critical factor in selecting a harvest date -- pH, TA, Brix, available lavor and harvestors, weekends, etc ??
Brix is certainly a leading reason to harvest, but what if deterioration starts before the brix ever gets to the perfect level?
I agree with IBGLOWIN. You don't want to have to make anymore adjustments than necessary. It is all a balancing act to get as much right as possible before harvesting begins.