(2011) introduce yet another reordering-specific metric, called fuzzy reordering score (FRS) which, like the KRS, is independent from lexical choice and measures the similarity between a sentence's reference reordering and the reordering produced by an SMT system (or by a pre-ordering technique).
whereas Birch, Osborne, and Blunsom (2010) used Kendall's tau between the two sentence permutations, Talbot et al.