In a well-run KPI system, the data custodian is responsible for providing (supplying/extracting/submitting) the data used to calculate and populate KPI reports. This role owns the data source operationally—ensuring the correct dataset is available on time, in the right format, with appropriate quality checks. The KPI owner is accountable for the KPI’s performance (interpretation, actions, improvement plans) but does not necessarily “produce” the data. The report generator compiles and publishes the report, yet should not be the one responsible for the underlying data accuracy or collection. The Strategy/Performance Manager oversees governance, cadence, and alignment across KPIs, but is not typically the operational provider of each KPI’s raw inputs. Clear role separation addresses common measurement challenges: late submissions, inconsistent definitions, and disputes over “whose number is correct.” During KPI activation, assigning a named data custodian, specifying the data source, and defining the handoff process (timing, validations, exceptions) are essential steps to make reporting reliable and sustainable.