Exam boards are given goals as to how far out of tolerance they can be in respect of the predicted comparable outcome. (schoolsweek.co.uk)
This ensures consistency in delivery, within and across schools, and therefore more comparable outcomes that are less open to interpretation. (thenferblog.org)
Under comparable outcomes, the regulator ensures that roughly the same proportion of students achieve each grade as in the previous year. (bbc.co.uk)