HTER
HTER stands for Human-targeted Translation Edit Rate. It is a metric used in machine translation evaluation to measure the amount of editing effort a human post-editor must exert to transform a machine-translated sentence into a post-edited reference translation. The score is typically computed as the minimum number of edit operations—insertions, deletions, substitutions, and sometimes shifts—divided by the length of the reference translation, usually measured in words. The resulting value ranges from 0 to 1 (or 0 to 100%), with lower scores indicating less editing effort and higher quality MT output relative to the post-edited reference.
HTER is a variant of the Translation Edit Rate (TER) that uses human post-edits as the reference
Limitations of HTER include dependence on the quality and style of the post-edits, as well as the