Graduation metric

A recorded positive outcome for a person who reached a defined competence and stopped needing the tool, held separately from ordinary churn. Its absence from a metric set means the best available outcome for a user is unrepresentable in the numbers the product is managed and priced by, which is why a retention curve for a capacity-building tool measures dependency in the slot where capability was supposed to go. The good direction of a graduation metric is up while the engagement number it corrects moves down, and reporting both together is the disclosure that makes the pair legible.