But there is no entirely subjective measure of what approach is «right» regardless of what criteria you apply. (politics.stackexchange.com)
While the old system relied on entirely subjective measures like classroom observations, the new system would link 50 % of teacher ratings to student academic growth. (newyorkschooltalk.org)
The remaining 60 percent is to be based on more subjective measures, including principal observations. (nytimes.com)