Estimating the Cost of Strauss Pile Retaining Wall Works Using the Cost Significant Method

Abstract Cost estimation is an important element in a project. In the early stages of project, information for estimates tends to be less accurate. Therefore, cost model needed that can explain most projects based on lack information. The method used Significant Model. aim determine accuracy Strauss Mast Retaining Wall Work against actual project cost. Data was collected using sampling method, and 5 (five) similar packages were obtained from 2019-2021. Produce 2 (two) Items have cumulative costs (80%), namely Pile (X3) 32% (X4) 48%. Then it analyzed produce regression equation formula SPSS application, Y = 5696.59+5.270 X3-1,389X4 with Model Factor 1.11. Estimated ranges -7.3% +8.4%. With average +0%. rate class 1 International AACE classification, which has lower limit -3% -10% upper +3% 15%. feasible use check bid estimate.