Warnings about acceleration are very arbitrary anyway. Especially on four engined aircraft. On a twin, it might give up to 40kts trend, on a sluggish 340-300 out of ABB a meager 10 might be all it gives. How to program that??
Every aircraft type has to have it's own performance database of course!
But I agree that SOPs and human performance considerations do have a priority here. Easiest way to avoid such a procedural break down would be to x-check actual TO speeds vs load sheet vs a speed booklet. But where are they in modern airplanes...
Dani