Landed in NCL with 3.2T, 757 the other day having taken paper work fuel.
Interestingly enough it says in our OPS MAN that alternate fuel should comprise of the fuel required in order to go around, execute entire missed approach procedure to holding point, then complete worst case expected departure routing enroute to worst case expected standard arrival at alternate to the IAF, followed by worst case procedural arrival.
Our alternate routing certainly doesn't consist of this. More like most direct route to alternate airfield with enough to get you overhead the airfield with final reserve....what about other airlines?