Time Overrun in Construction Projects of Sulaimani City

Several constructional projects in Sulaimani face to the delay, during the stages of designing and implementation. The delay refers to various causes. There are several key persons) resources) (templates) (clients) (factors) (characteristics) (parameters) that have direct effects on delay of the projects. The study was conducted and depended on two different methods practical and theoretical parts, for performing practical part two specific elites were chose, the first elite was the expert engineers that had actual practical involvement in construction projects and the second elite was the contractors that had a real suffering from delays of their projects. While the theoretical part was depended on reviews for the existing studies to collect information. The practical result showed that the five most effective key persons were the (1-Laws and Regulations, 2-Contractor, 3-Designer, 4-Resident Engineer, 5-Site Location) seriously. While the reviewed results for the existing studies showed (1-Designer, 2-Finance/payment, 3-Weather, 4-Unforseen circumstances, 5-Lack of Site management by Contractor). Keywords: Constructional projects delay, Time extension, Mistakes of design, Plan and scheduling, Variation order.