Current evaluation metrics look at the basics of language skills such as spelling, proper grammar, etc. which don't always translate well * pun - intended * in a conversational setting. (elearningindustry.com)
Unfortunately, there's also been a lack of systematic and objective evaluation metrics in their development. (inc.com)
This year [2011] we have to deliver [that evaluation metric] for the tested subjects. (educationnext.org)