Construction delays are a common problem in the Egyptian construction industry. Frequent delays in a project can lead to disputes and litigation. This paper aims to study and analyze the causes of construction delays.,This research identifies delay causes in residential projects in Egypt and analyzes these causes with the relative importance index method. The feedback of construction experts was obtained through interviews. Subsequently, a questionnaire survey was prepared. Fifty-six different delay causes were identified and categorized into eight categories based on a literature review and interviews with 36 experts from the construction industry who represent owners, consultants and contractors.,According to the highest values of the relative importance index, the top ten delay causes of residential projects in Egypt are determined. Statistical analysis is carried out using the analysis of variance method to test delay causes obtained from the survey, which revealed a good correlation between residential projects parties with respect to most of the delay causes. A fuzzy logic model using MATLAB is developed for determining the probability of delay of residential projects, and the model was tested in a real case study and was found to be satisfactory.,Delay causes in residential projects in Egypt were identified, and these causes were analyzed using the relative importance index method and fuzzy logic.

中文翻译：

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评估埃及住宅项目延误的模糊模型

施工延误是埃及建筑业的普遍问题。项目中的频繁延迟可能导致纠纷和诉讼。本文旨在研究和分析施工延误的原因。本研究确定了埃及住宅项目中的延误原因，并使用相对重要性指数法对其进行了分析。通过访谈获得了建筑专家的反馈。随后，进行了问卷调查。根据文献回顾和对来自建筑业的代表业主，顾问和承包商的36位专家的访谈，识别出五十六种不同的延迟原因并将其分为八类。根据相对重要性指数的最高值，前十位确定了埃及住宅项目的延误原因。使用方差分析法进行统计分析，以检验从调查中获得的延迟原因，这揭示了住宅项目方与大多数延迟原因之间的良好相关性。开发了一种基于MATLAB的模糊逻辑模型，用于确定住宅项目的延迟概率，并在实际案例中对该模型进行了测试，结果令人满意。发现了埃及住宅项目中的延迟原因，这些原因是使用相对重要性指标法和模糊逻辑进行分析。