Unreliable and poor-quality data is a significant threat to governmental institutions because of its devastating impact on nations' social and economic well-being. Managers in government organizations require reliable data to inform economic planning and decision-making. Grounded in the theory of total quality management, the purpose of this qualitative multiple case study was to explore strategies information technology (IT) managers in sub-Saharan African countries use to ensure the reliability of data. The participants were 12 IT managers in three government establishments in Port Harcourt, Rivers State, Nigeria, responsible for ensuring the data reliability for economic planning and decision-making. The data collection included semistructured interviews of IT managers and analysis of documents (n = 6). Thematic analysis resulted in five primary themes: data quality assessment, education and training, use of technology, management and employee involvement, and advocacy and sensitization. A key recommendation is that IT managers conduct regular quality data assessments of collected data to ensure integrity. Managers should also review and update organizational data collection processes to align with global best practices. The implications for positive social change include the potential to ensure appropriate budgeting and resource allocation to states and local governments areas, which may improve the living condition of citizens. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]