Mcdu does not take anti ice into consideration for descent, but a fully managed descent gives room for airspeed increases to cater for the anti ice. This is usually enough.
As for the winds verses actual. Whatever you load into the Mcdu will be taken as gospel by the computer. Rubbish in = rubbish out! Correct the loaded winds if a marked difference is apparent. Update the isa difference to actual for a more accurate opt/max prediction.
ND uses actual wind for prediction. Always reliable.
Hope this helps.
ps. no way to change the alt crz lvl. Play it safe, add extra couple 100 kilos for diversion gas!
Last edited by cameljockey; 24th Jan 2013 at 04:42.