Analysis and measures to improve the efficiency of building information modelling in cost estimates

Abstract

Building Information Models (BIM) and information in these models have been responsible for an "industrial revolution" in the construction industry, but there has not been the same focus on BIM in the early stages of planning, such as using it in cost estimation and calculations, also called 5D-BIM. Our research question is: “What are the advantages and disadvantages of using BIM in the estimation phase, and which measures can make this more efficient and user friendly.” Information was first obtained by examining cost estimation programs used in a larger construction company in Norway. Secondly a survey was sent out to employees in the construction industry, where the respondents were asked to assess and explain their relationship with BIM and cost estimation. The results revealed that there is a lack of competence and training for those who use BIM-models for cost estimation. Secondly It has been identified that BIM-models used to calculations is not detailed enough. Integration of cost estimation earlier in the project development would have more influence on choices and solutions. The conclusion is that cost estimation has to be more efficient in the interaction with BIM, including implementation of stricter requirements for BIM-models used for dynamic calculations, skills need to be raised, calculations should be involved earlier in the projects, and the public sector should be involved more to propose measures.