The use of the SETIA project monitoring system that has been developed by the Federal Government of Malaysia is analysed with a view to identifying some general lessons for planners and policymakers involved in the development of decision support systems in both more developed and less developed countries. An important feature of the SETIA system is the wide range of users in central planning agencies, spending ministries, and state-level agencies that is involved and the extent to which the system makes use of well-established monitoring and evaluation procedures.