The purpose of this research is to show the benefit of the Finite Element Method overrnthe Conventional Analysis Method for deep excavation design. This research isrnconducted on the Assem Building excavation, which has a 4B+G+6 podium and 15rnstories and is located in Addis Ababa, Ethiopia, and is surrounded by busy roads andrnbuildings. Following a comprehensive assessment of the literature on the analysis andrndesign of excavation support walls, specifically anchored soldier pile walls, FEA andrnconventional analytic methods are used to model the excavation of the Assem Building. rnIn the conventional analysis approach, the Assem Building's excavation support wallsrnwere analyzed and designed using the DeepEX software program and the GEO5rn"Sheeting Check" software tool. Similarly, the FEA method uses the Plaxis 2D softwarernprogram. Similar model sizes and soil and structural element parameters are usedrnthroughout all software programs. rnThe following result was achieved by analyzing the Assem Building excavation.rnAccording to the FEA and optimized FEA results, the bending moments along the pilernlength are 40 % and 36 % lower, respectively, than those found using conventionalrnanalysis methods. Similarly, shear force calculated using FEA and optimized FEA arern41 % and 44 % lower, respectively, than those calculated using conventional analysis.rnThe conventional method makes considerable assumptions about the solutions, but thernFEA method makes no such assumptions and treats the problem as it is. As a result, thernFEM result is lower than that of the conventional method. Because of the lower results,rnthe FEA approach saves 9% to 11 % of the cost of the conventional analysis method.rnThe optimized FEA also results in a cost reduction of 14 to 15%.