الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Delay in construction projects is considered one of the common problems causing a multitude of negative effects on the project and its participating parties. Delay is a situation in which a project due to some causes related to contractors, client, client’s consultant or other causes has not been finished on contractual or agreed period. Delay are insidious often resulting in time overrun, cost overrun, disputes, litigation, and complete abandonment of projects. Therefore, it is essential to study and analyze causes of construction delays. This report studied a list of construction delay causes gathered from literature having different types of construction, different countries, different periods and different numbers of delay causes and delay groups. A questionnaire and personal interviews have formed the basis of this report listing 70 delay causes. The questionnaire survey was conducted to determine the opinion of construction participants who represent consultants; contractors, and site/design engineers including the owner for their priority on the most likely delays, which occur in construction projects in Egypt during construction, the answers were used to make a pairwise comparison between the delays factors, then ”SPSS” Statistical Package for Social Sciences Method, and ”A.H.P” Analytic Hierarchy Process Method were used to normalize the uncertainty estimates and to rank the delay occurrence likelihood. Then present a model application software (predict the delays of the construction projects duration before starting implementation) with a several cases of studies on construction projects in Egypt already finished and delayed. Cases studies were analyzed and compared between Actual Delay with Actual Causes and the equivalent result from analysis and applying the model of software. Results show 1- In case studies of project duration (less than 12 months), the Analytic Hierarchy Process (AHP) method was more accurate at predicting the percentage delay of duration, Statistical package for social sciences (SPSS) method was not applicable in this size of projects. 2- For case studies of project duration (more than 12 months), the both methods were applied, giving a comparable results.