Quantifying Alumni Engagement

A great way to quantify Alumni engagement to a  institution of higher ed, would be to assemble a list of all those perceived as the most highly engaged people to the institution and assign them a flag that could be used as a target variable: "highly engaged". Of course, it's subjective, but training a model on this variable could be the best possible solution. Potentially more art than science. It would acknowledge the fact of giving≠engagement. It would necessarily take a peer-review sort-of meeting to assemble this list, which should be a very large one. Bonus: the participants would feel ownership of the score and more immediately buy into it.