Much of the appeal of performance measurement is explained by its image as a simple and value-neutral way to monitor and improve government. But contemporary governance is characterized by complexity. Few public officials have the luxury of directly providing relatively simple services, the context in which performance regimes work best. Instead, they must work in the context of a disarticulated state, with policy problems that cross national boundaries and demand a multi-actor response. At the same time, traditional democratic values must be honored. This article examines the tensions between performance regimes and the complexity of modern governance, identifying implications and questions for research and practice