Calculating LDG performance for every landing, adding 15% margin on top of the figures will not prevent an overrun. Going around if ground contact not positively achieved in the TDZ would! (**)
regards,
FD.
(**) that why we never practice this in SIM, do we?
I'm not sure I understand what you are trying to say, or meaning. Perhaps there is a typo. Would you please clarify. I do agree that the TDZ point, assuming the correct speed, is more relevant then a couple of kts extra tailwind.