Indeed, they absolutely have not.
The more modern versions of Airbus 320 family FMS have embedded minimum-duration 15 minutes level segment for calculating the cruise altitude.
Although only introduced about 14 years ago.
The young keep discovering what the wise start to forget. 👍😁
To OP: Otherwise, for more guidance, Google hard for Optimum Altitude on Short Segment , there was a graph to determine. Cannot remember if AB or BG.
Last edited by FlightDetent; 7th Nov 2020 at 07:25.