Relationship Model Between Conceptual Cost Estimation Process of Flyover Development in the Provincial Government of DKI Jakarta with the Accuracy Level

Abstract

AbstractThe conceptual cost estimate for flyover development is the cost estimate when the flyover construction does not yet have complete planning data. In the DKI Jakarta Provincial Government, the forecast is used for the proposed flyover construction budget in the 5 Year Strategic Plans and Multi-Year Activities. In the estimation process, there is a level of accuracy that still needs to be improved, which causes the regional development planning to be less effective because other allocations have shifted in priority. Various factors can cause this in the estimation process that affects the level of accuracy. This study aims to identify the factors or variables in flyover construction's conceptual cost estimation process in the DKI Jakarta Provincial Government that affect accuracy. And then, to analyze the model of the relationship between variables of conceptual cost estimation process to the level of estimation accuracy, using the SEM-PLS method. 8 variables in the conceptual cost estimation process, which affect the estimation accuracy, have been identified through literature studies and expert validation. The variables are information quality, scope quality, estimator performance, estimating procedures, project definition, cost information, project characteristics, and government regulations. Based on respondents’ results and the relationship model's analysis with the SEM-PLS method, the model produces 12 significant relationships between the variables of the conceptual cost estimation process for flyover development, with an R-square value of 0, 279.KeywordsConceptual cost estimation processFlyover developmentAccuracyStructural equation modeling