The answers are all in this thread just not in one post, applying boeing airbus landing techniques to a Hawker 800 maybe isn't quite as relevant as people think much more iniertia, different spool down rates for the engines.
My 2p'sworth is to read the AFM, in their is a definiive guide to how the test pilots derived at the raw figures, more than likely it will say that the TR's were not involved, it will probably say that the thrust levers were closed at 50ft at VREF over the runway. Test pilots when certifying aircraft are fairly brutal with them, not for the reasons of trying to achieve better figures but to ensure that they have consistency in their data, no point chuck landing one way and john another.
Regardsless of what advise you are given here just arrive at 50ft on speed and then do what the AFM says! should you wish to be less brutal than the test pilots youwill use more runway, this is what factoring is about cos we dont want to hit the runway at 180fpm or whatever the hard landing criteria says it is.
If you add speed then more runway will be used, consider the 90 degree gusting x-wind scenario if you are arriving with an extra 10-15 knots and its Part 91/private and its a tight runway then problems may ensue!