Data and information gathering, including disaggregated Gross Domestic Product (GDP), provides the basis for evidence-based policy choices. Sound policies are essential for economic development. Likewise, efficient economic management requires timely, accurate and reliable information. It is with a view to effectively utilize data (among others) in a systematic form to target developments in the economy that saw the emergence of the new short, medium and long-term plans. The main function of the Planning, Research and Statistics Department (PRSD) is to, among others, prepare development plans, monitor and evaluate plan implementation, and research into respective economic sectors and the internal organization and operational modalities of their ministries. Others include continual collection and processing of data and statistics. These important activities suggest that the PRSD is the fulcrum of the economic policy making process. The DPRS of Ministries, Departments and Agencies (MDAs) therefore are saddled with the responsibilities of collection, collation and management of relevant data at that level and also provide a link with other relevant agencies within the Nigerian Statistical System. This arrangement engenders a consistent and reliable database that encourages plan and budget discipline. Given the centrality of data to socio-economic decision making, adequate knowledge of the various methods and techniques of data generation, analysis and management is necessary for officers involved in planning, research and statistics.