%0 Journal Article %T Site Layout Optimization and its Impact on the Cost of Construction Projects %J Amirkabir Journal of Civil Engineering %I Amirkabir University of Technology %Z 2588-297X %A Taheri Amiri, Mohammad javad %A Hematian, Milad %A Haghighi, farshidreza %A Javaheri Barforooshi, Maedeh %D 2021 %\ 04/21/2021 %V 53 %N 2 %P 495-514 %! Site Layout Optimization and its Impact on the Cost of Construction Projects %K Dynamic site layout %K IWO algorithm %K Layout cost reduction %K Construction Project %K facility location %R 10.22060/ceej.2020.15506.5945 %X The dynamic site layout is identifying the optimum location for temporary equipment, materials, and other available tools and offices at construction sites. The Site layout is classified as a dynamic problem because the necessary equipment is changed continuously during the project lifetime. Some research investigated this issue in recent years and tried to develop various algorithms to solve such problems due to its complexity. In this study, a linear programming model is proposed to minimize total transportation cost among different parts, relocation cost for the moveable facility, and transportation cost between the warehouse and other parts. An invasive weed optimization algorithm is developed to solve large-scale problems. Computational results show that different layout is obtained based on priorities considered for each part so that their layout can be changed if priority is varied. To validate the proposed algorithm, its results for the small-scale problem are compared with results obtained from solving it in GAMS software. Results obtained from the proposed algorithm for small problems reveal that they are so close to obtained from the exact method. Furthermore, scenario analysis indicates that the proposed metaheuristic algorithm is outperformed, thus the proposed IWO algorithm can be applied for solving the large-scale problem in the real world. %U https://ceej.aut.ac.ir/article_4135_02bbd1ed6e9c2c83d1c2776362b4dcb3.pdf