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The projects includes temporary endeavor to generate unique products, services, or results. The main objective of the projects are to create the desired results at the end of the project. There have been major developments in project management over the years. However, some studies have shown that the success rates of the projects are far from the desired levels. Studies to determine the success rate of the projects; are carried out by specialized professional associations. In this study, for expert opinions, we followed the methodologies used by Standish Group and Project Management Institute. Project Management Knowledge Accumulation Guide (PMBOK) published by the Project Management Institute in project management; considers achieving the goals successfully within the previously drawn frame. In the light of literature review and available information, it can be seen that; understanding the changing dynamics of a country basis is important for measuring and directing the success of projects. However, there has been no study analysing the success rate of the projects executed in Turkey. So, there is a need to measure the success rate of the projects carried out in Turkey and a suitable model specific to Turkey needs to be developed. Therefore; this study, carried out in Turkey, aimed to measure the level of achievement, identify the major factors behind the success and the failure. The study started with the necessary literature reviews. Previous studies and reports were examined and the data collection process was carried out by creating a similar structure. In this study, data were obtained from primary sources. As a data collection method, one of the quantitative research methods as the questionnaire. The questionnaire prepared over Google Forms was distributed to the project professionals online. Results were interpreted with the obtained findings. The final and most general result; the overall success rate of the projects was 52%, the problem rate was 40%, and the failure rate was 8%. Afterwards, the sector, project scale, sizes and projects were examined in detail. Afterwards, the sector, project scale, sizes and projects were examined in detail. A comparison was made between the obtained data and the data shared by the Standish Group and the Project Management Institute in their studies on success. It has been observed that the success rates are generally in parallel with the completion rates and failure values on time, budget and scope. When the success and failure factors are compared, we see rankings and percentages similar to The Chaos Report.