Comparison of different cost estimation methods with use of building information modelling (BIM)

Abstract

The paper deals with the topic of cost estimation methods with the use of Building Information Modelling (BIM) in construction projects. As BIM is trending in construction industry, and many countries make decisions to require BIM in public contracts, the demand for various utilization of digitized construction related data increases. One of utilization options is the use of BIM for quantification of construction projects production and for following cost estimation. The paper presents results of a research on possible methodologies for such BIM utilization. The methodology has not been established yet, as there are many various estimation systems with different requirements - e.g., cost estimation systems require a different structure, information models have different standards, country specific legislation requires different information, calculation formulas vary etc. The paper shows and explains different solutions for different cases in general, so the results are applicable for most of the different cost estimation systems throughout the world. The presented solutions are then compared to show their advantages and disadvantages for the purpose of possible implementation of new systems. Based on general methodologies, country or company specific steps may be taken to properly develop the working system for BIM data utilization in cost estimation processes. The paper ends with conclusions and discussions on further research and further harmonization of the mentioned cost estimation methods.