The statistical assessments point out that approximately half of information technology (IT) projects cannot provide basic necessities and a quarter of them fail. Therefore, the necessity of effective project management tools to enhance the project management practices increases day by day. "Project management maturity model" as one of these tools is attached more importance in IT firms. This study aims to present a framework for IT project maturity level measurement and indicate how project management maturity level differs in terms of firm characteristics. Within the scope of the research, Kerzner's Hexagon of Excellence is extended with additional questions related with firm characteristics, and a case study including 16 firms from Istanbul Technical University (ITU) ARI Techno Park is conducted. In the light of responses, (1) problems which are realized in the project management processes revealed out, (2) relation between firm characteristics and project management skills are discussed and (3) results are interpreted in order to provide managerial insights.