In 2004, the Government announced 110 Public Service Agreement (PSA) targets for 17 Departments covering the period 2005-08. PSA targets express the priority outcomes that Departments are seeking to achieve nationally and internationally, and cover key aspects of the Government's social, economic and environmental policy. Large sums of public money are devoted to the programmes designed to deliver them. This NAO report summarises the results of its examination of the data systems used by twelve government departments to monitor and report progress against their 2005-08 PSA targets, covering a total of 237 data systems. Overall Departments have successfully taken steps to improve the quality of their data systems. There are still improvements that can be made to increase the relevance and reliability of data used in the reporting process. The NAO makes a number of recommendations on specification of data systems, their operation, and the reporting of data. A companion volume (HCP 22-I, ISBN 9780102951615) is available separately which contains the NAO's summarised findings.