Determining project achievement indicators from the beginning of its establishment is one of the most important success factors that must be clearly documented for all parties involved in the project to achieve high fluidity during implementation, which is done through the application of project management as the most efficient method for implementing and completing construction projects to include the project life cycle (from the feasibility study stage to the close-up stage). The main objective of this study was to present a report on some important results resulting from an extensive study examining the role of critical factors determining the success of the construction project implementation. These results are supported by a lot of theoretical and survey work that was conducted on a group of fifty engineers distributed across ministries, companies and various positions on the role that these factors play in the success of the project. It was found that the answer depends on the stage of the life cycle in which the project falls. As a result, empirical evidence was provided to project managers indicating the need to pay attention to specific groups of critical factors at each of the four stages of the project life cycle. It has been proven that these factors have a strong impact on the success of the project, and in some cases represent up to 66% of the reasons for the success of the project implementation.