Orçamento de casas de alto padrão: uma análise comparativa entre orçamento paramétrico, analítico e custo real da obra

Abstract

The success of a construction project directly depends on knowledge of the costs required to carry out the work, therefore, it is essential to prepare a detailed budget that is faithful to the scope of the project so that the contractor can obtain a strategic advantage over its competitors. However, in the current panorama of civil construction, the analytical budget is prepared based on reference budget manuals, such as SINAPI and ORSE, which are banks of unitary compositions supported by current legislation, but which are not necessarily able to portray the reality of the work, causing budget deviations and losses to the contractor or owner. In this sense, the main objective of this research was to carry out a comparative analysis between the unit costs of compositions and inputs from reference banks and the real costs of a high-end single-family residential project. The research method was divided into three stages: preparation of budgets, parametric and analytical, extraction of the real cost through daily expense monitoring reports, and analysis of the results based on the percentage deviations obtained from the comparison of unit and total costs. The results showed high percentage variations between budgeted and actual prices for inputs and services whose unit cost is very dependent on the finishing standard adopted in the execution of the work, while inputs such as concrete and cement, which are independent of finishing, had low deviations of cost. Therefore, it is concluded that the unit costs used in compositions of reference manuals, such as SINAPI and ORSE, present good accuracy for materials and services that are not affected by the finishing standard, however, for services relating to the stages of ceramic coatings, paintings and frames, it is necessary to quote a price with suppliers or use private composition benches that portray high standards of finishing