This document discusses performance budgeting and related concepts. It defines key terms like inputs, outputs, outcomes, and indicators. It also describes the results chain showing how inputs lead to activities, outputs, and intermediate and final outcomes. The document notes there are varying interests in performance like those of purchasers, suppliers, and regulators. It outlines objectives of performance budgeting like improving allocative and operational efficiency. Finally, it describes different OECD models of performance budgeting on a spectrum from contractual to program budgeting.