KPI Documentation and Ownership

Every metric in the KPI system has a definition document. The document contains: the metric name and definition (in precise, unambiguous terms), the calculation formula, the data sources, the refresh frequency, the owner (the person accountable for the metric's accuracy), the thresholds and targets, the paired counter-metric, and the decision the metric supports. This document prevents the "what does this metric actually measure?" conversation that derails every third data review meeting. When two people disagree about a metric's meaning, the definition document is the arbiter. When a new team member joins, the documentation is their onboarding. When the metric needs to change, the documentation shows what was, enabling a deliberate transition to what will be.