Dryfta calculates the average rating of an abstract based on a scale of 10.
In your abstract management system, admin may have created review questions with different scale for each question.
So, for example, you have a review question with scale rating from 0 to 5 and another review question with scale rating from 1 to 10. In this scenario, there's no unique base scale out of which the system should calculate an average rating.
That's why the system is hard-coded to generate an average rating on a scale of 10 irrespective of the scale rating that an admin has set for various review questions in the review submission form.
Average rating of an abstract as given by a reviewer
To calculate average rating of an abstract, Dryfta would sum up a reviewer's ratings for each question (see screenshot) and then multiply it by 2 to generate an average rating of the abstract on a scale of 10, as given by the reviewer.
Final average rating of an abstract
To generate the final score of an abstract, Dryfta would sum up average rating given by each reviewer for the abstract and then divide it by the total number of reviewers who reviewed the abstract. This generates the abstract's final score on a scale of 10. See screenshot.