After peer grading is over for an assignment, each hand-in receives a "Hand-in score". This score is between 0% and 100% depending on how well the peers evaluated the hand-in. To get hand-in scores, the evaluation rubric needs to have at least one evaluation criteria that is either Yes/No or Scale.
The way the total hand-in score is calculated for a hand-in is by averaging the scores from each of the peers. The score from an individual peer evaluating a hand-in is obtained by averaging over the criteria in the evaluation rubric.
The numerical score for each criteria is normalised to be between 0% and 100%, where 0% is given for the worst possible answer, and 100% for the best possible answer. As an example, in a Scale-question with 5 levels, the different answers will count 0%, 25%, 50%, 75%, 100%.
If a student has flagged part of their received evaluations and a teacher has accepted the flag and overruled the original evaluation, then the teachers new evaluation is used for computing the score instead. If a teacher overrules a specific answer by one student, this does not overrule evaluations on the same criteria, on the same hand-in by other students.