Who doesn't know the easy rule of thumb?
(GS X 5) + 5 = ROD for 3° GP
It is that easy.
Ok, if your app. isn't a 3° GP, use your common sense. But please no diving!!!!!!
Try the stepdown procedure with a 747, you will have to give almost full t/l to level-off. And, oh yeh, think about the passengers to please.