Microburst2002, that's correct. It's recommendation though if I recall correct. Also bear in mind the landing technique must be accounted for as well e.g auto land requires additional margins. It's all available in the relevant FCOMs. Once again the utter importance of landing performance software for daily operation can't be emphasized often enough. Whatever was the dispatch plan might not be relevant any more actual conditions etc must fully be taken into account for actual landing performance.
Cheers.
