Semnan University International Journal of Nonlinear Analysis and Applications 2008-6822 16 4 2025 04 01 Utilizing a hybrid fuzzy DEMATEL-ANP-Delphi approach for identifying and prioritizing construction cost overruns in project management 83 92 8991 10.22075/ijnaa.2023.31645.4692 EN Ali Marzangoushi Department of Civil Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran Alireza Mirjalili Department of Civil Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran Hassan Dehghan Dehnavi Department of Management, Yazd Branch, Islamic Azad University, Yazd, Iran Journal Article 2023 07 30 Construction projects are frequently associated with a high incidence of cost overruns. To address this issue, the present study adopts a descriptive and survey-based approach to identify and rank the factors that contribute to construction costs. The study's statistical population comprises ten expert specialists, and the fuzzy Decision-Making Trial and Evaluation Laboratory (DEMATEL) with Analytical Network Process (ANP) (DANP) technique is utilized to evaluate the research factors. Additionally, the fuzzy DANP and Delphi methods are employed to rank the essential dimensions and criteria of the research. The study's findings reveal that environmental factors are the primary cause of construction cost overruns, followed by managerial factors and legal and administrative factors, respectively. Dynamic conditions often result in unpredictable challenges for environmental factors, making them a critical driver of construction cost overruns. Therefore, environmental factors play a significant role in contributing to construction cost overruns. https://ijnaa.semnan.ac.ir/article_8991_0eb12ccf134597ff6d60ff9aa6e0882e.pdf