Enhancement of project preparation stages has been recognized as the most critical factor effecting the success of engineering and construction projects in Sudan. Explicit and implicit references in the study to the causes of these issues are cheap work, cost overruns, not aligning roles and responsibilities of stakeholders and failure to implement a risk management framework by extensive literature review, real world case studies, combined and multi method research methodology. Findings have emphasized that reform and capacity building are essential elements of successful construction project performance in developing countries. Measures are recommended to overcome these obstacles for sustainable infrastructure development in Sudan.