What criteria are established predictors of success, through what indicators can these be assessed, and what sources of evidence relate in order to inform the assessment?

Basic example:

Your rubric can be more robust, sophisticated, and complete. This is just a simple illustration. See also Vanier Criteria for a more robust example.

Once you have established the Criteria, Indicators, and Sources, you may also want to determine the relative weight of each criterion category, and develop a scoring system where each candidate application receives a numeric score in each category and an overall total score.