The structure of the book consists of the three main parts: -the first part concerns the directions for the development of IT systems, management under dynamically changing theoretical and practical conditions, which break some of the patterns of thought that function almost as axioms in the field, -the second part presents the concept of combining the development of methodologies applied in the analysis and design of the IT systems with the development of, on the one hand, technological aspects of the systems development, on the other hand, computer-aided management systems in commercial methodologies of process and project management, -the third part presents the results of project activities- IT systems supporting management with the application of the authors own concept of the analysis of their development and a brief description of their selected features.