en Construction Management Construction Management Research Paper Research Paper The paper presents a hybrid-enhanced algorithm based on CSS for discrete problems whit the focus on traveling salesman problem. The CSS algorithm based on some principles from physics and mechanics, utilize the governing Coulomb law from electrostatics and Newtonian laws of mechanics. However, the CSS is more suitable for continuous problems compared with discrete problems. In this paper, we have tried to resolve this defect of CSS algorithm with the help of local search methods and nearest neighbor for discrete problems whit the focus on traveling salesman problem (TSP). To prove the efficiency of the proposed algorithm, results compared with the results of benchmark problems. Then, the proposed algorithm is used to solve the TSP, using as a method for solving the single row facility layout problem (SRFLP). To prove the efficiency, the results are compared with the results of benchmark problems reported in the recent literatures. Charged system search (CSS), Traveling salesman problem, Discrete problems, Single row facility layout problem 363 370 http://ijce.iust.ac.ir/browse.php?a_code=A-10-218-66&slc_lang=en&sid=1 A. Kaveh alikaveh@iust.ac.ir 180031947532846007897 180031947532846007897 Yes Iran University of Science and Technology H. Safari hamed_safari@civileng.iust.ac.ir 180031947532846007898 180031947532846007898 No Iran University of Science and Technology