Originally Posted by 629bus
FMC
Optimum = current weight and cost index
Maximum = current weight, coat index and temp
Recommend = current weight, cost index, temp and winds. (uses 100% of fms wind for actual position and a 50/50 mix 200nm ahead of the aero plane with forecast winds).
On the Airbus, what you call the Recommended is the Optimum OPT, and what you call the Maximum is the Recommended Maximum REC MAX.
With favorable winds the OPT can even match the REC MAX.
Also, the Optimum, as you defined it, is a QRH value, or the FMS OPT if winds were not inserted.
How do you load the winds, is it a facetious process by WPT and FL, or is it more straightforward ?