Relações paramétricas para estimativa de custo de edifícios residenciais de alto padrão baseados no plano arquitetônico de massas: um caso aplicado na empresa X situada em Curitiba, Paraná

Abstract

The detailing of a building project naturally develops according to its life cycle. As the maturity of the project grows, more quantitative and qualitative information can be extracted and applied in a budgeting process. Therefore, budgeting is characterized as evolutionary. At an early stage of the project phase, during the economic and financial feasibility study for the purchase of land, it is necessary to estimate the cost of the project in order to obtain an investment amount. At this stage, there is no greater understanding of the projects, with the exception of an architectural mass plan, a table of areas, and a memorial from the construction company in question. The unavailability of further information makes the execution of a detailed budget unfeasible. Thus, the feasibility budget arises from a cost estimate based on information available at the time. Based on the above, the present study will develop a cost estimate, through parametric relations, in high-standard multifamily buildings of a Company X, located in Curitiba/PR. The estimation method chosen was the parametric relations resulting from a study of simple linear regressions, which relate some services taken from the project analytical structure with some cost drivers. The parametric relations will be tested for their quality and effectiveness, through the determination coefficient and the linear correlation coefficient, respectively. Nine of the ten services analyzed showed strong correlations with their respective independent variables. When applied to a construction project, the relationships generated adequate quantities that directed to a cost forecast within the predicted range for a feasibility budget.