INTEGRATION OF CLASSICAL AND AGILE PROJECT MANAGMENT METHODOLOGIES BASED ON ONTOLOGICAL MODELS Jan WEREWKA, Piotr SZWED, Grzegorz ROGUS AGH University of Mining and Metallurgy, Department of Electrical Engineering, Automation, Information Technology and Electronics. Automation Faculty, Laboratory of Information Technology. Summary. In the paper the problems of IT project management and trends of project management methodologies development are discussed. The two base categories of project management methodologies are presented: classical based on project plan and agile based on product streaming to increase its value at the end of release iteration. As stated in the work, it is advisable to use both methodologies or to integrate them within an IT enterprise. The article proposes an approach to the problem of integration of project management methodologies consisting in building their formal ontological models and performing integration of these models based on techniques of concept mapping and ontologies alignment. Ontologies of the PMBOK and the Scrum, the two most popular project management methodologies representing classical and agile approach, are developed. The results of their integration will constitute a coherent formal description defining mapping of elements of both methodologies. They may be useful for IT enterprises running projects in heterogeneous environment and can be a basis for future integration of both methodologies. Keywords: IT projects management, Scrum, PMBOK, ontology, modeling. 1. INTRODUCTION The development of Information Technology sector, which is highly significant from the economic and strategic point of view, depends decidedly on a successful management of various IT projects in this industry. The classical (traditional) methodologies fulfill a recognized role in this process. However, we observe lately a vivid development of the management methodologies known as agile. The question is whether both classes of methodologies can be successfully used in an IT company and is it advisable to integrate them. This paper focuses on companies for which it may appropriate to use both methodologies or to integrate them. The assumptions are as follows:  The suggested solutions apply to IT enterprises whose business activity is mainly based on projects realization.  The IT companies provide an environment for conducting many projects at the same time.  At the lower management levels the projects can be conducted, using various management styles and production techniques.