The increasing importance of service sector forces organizations to present more and more services to citizens and business. Every country aims to improve and facilitate the use of e-services in the public sector. This paper enquires into a process of effective evaluating and controlling the development of new services and upgrading the existing ones as a part of a comprehensive project at a national level in Bulgaria. The implementations of different concepts of Information Systems, Software Engineering, and Project Management areas are discussed in the paper in the connection with the presented approach.