KRIs are designed to provide early warning signs that a risk event is becoming more likely or that the organization's risk appetite may be exceeded. They are leading indicators that help proactively manage risk.
While KRIs can be used to measure risk within business lines (B), their primary purpose is to alert about potential changes in risk levels, not just provide a static measure. Comparing current to past levels (C) can be part of KRI monitoring, but the focus is on early warning.