Análise comparativa entre custo real de uma edificação e orçamento estimado pelo sinapi: estudo de caso.

Abstract

The executive budget for construction projects is essential for the planning of a building, as it defines the detailed costs for each stage of the construction, allowing for cost monitoring and avoiding potential waste and deviations that could compromise the schedule, cost, and final outcome of the project. In this context, the National System of Costs and Indices for Civil Construction (SINAPI) plays a crucial role, providing a database with updated and regionalized prices for inputs and services specifically for the construction sector. Thus, this study aims to analyze the disparities between the budget prepared using compositions valid at the time of construction and the actual cost spreadsheet for a single-family building executed in 2022 in the state of Goiás. A comparison was made between the main construction stages, based on the spreadsheets developed using SINAPI data and the actual costs applied in the project. Labor and inputs were treated differently in each budget: SINAPI used standardized compositions, while the actual costs took into account material negotiations and contract agreements by contract work. The greatest discrepancies occurred in services such as infrastructure, masonry, joinery, and finishes, due to the absence of specific inputs in the SINAPI database and the flexibility in direct negotiations with suppliers. While SINAPI is an important reference tool for budgeting, it should be used with caution and combined with customized methods to more accurately represent the actual costs of specific projects.