How can we measure machine translation quality?

@inproceedings{pub5398,
    author = {

Federmann, Christian
},
    title = {How can we measure machine translation quality?},
    booktitle = {Proceedings of the Tralogy Conference. Translation Careers and Technologies: Convergence Points for the Future (Tralogy-11), March 3-4, Paris, France},
    year = {2011},
    month = {12},
    publisher = {L’Institut de l’Information Scientifique et Technique},
    note = {Participant in panel discussion on MT evaluation with Philipp Koehn and John Moran, chaired by Josef van Genabith.}
}