Key Performance Indicator (KPI) is a metric that is used to quantify the success of a process step or action. Key Performance Indicator Models (KPIMs) incorporate KPIs into a process flow to help add priority information around the requirements, with are connected to the process step the KPI references.
For more information:
Learn more about requirements models in our book Visual Models for Requirements.(See Chapter 5 for Key Performance Indicator Models)
For more requirements templates see our BA resources.