Performance measurement is the systematic ongoing monitoring and reporting of program accomplishments, particularly progress toward pre-established goals or standards. Performance measures or indicators may address program staffing and resources (or inputs), the type or level of program activities conducted (or process), the direct products or services delivered by a program (or outputs), or the results of those products and services (or outcomes).
Centre for Evaluation Methods and Uses. (2011). Performance measurement and evaluation: Definitions and relationships (#GAO-11-646SP). Washington, DC: United States Government Accountability Office.