Cost Estimation in Construction BIM vs Total BIM Master’s thesis in Design and Construction Project Management
Typ
Examensarbete för masterexamen
Program
Design and construction project management (MPDCM), MSc
Publicerad
2022
Författare
Påsse, Daniel
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
It is known that cost overruns are an issue in the construction industry, and in an
industry with such small margins of profit there is always a desire to cut costs. To
facilitate and improve the efficiency and quality of cost-estimation processes, the
implementation of Building Information Modelling (BIM) has been promoted in the
construction industry. Recently, the concept of ‘Total BIM’ has emerged in
Scandinavia, where the BIM becomes the legally binding construction document. This
approach excludes traditional 2D-drawings and puts more requirements on the actual
BIM, which should then promote more use within cost-estimation. This thesis
highlights, explores issues, challenges, and potential within the cost-estimation process.
10 interviews were conducted with participants from recent projects involving the use
of BIM and traditional construction documents in parallel. Secondly, an in-depth
investigation of a Total BIM project was performed with respect to model quality,
quantity take-offs, and cost estimations. Findings show that even in projects where BIM
is present, traditional 2D-based methods were still used for cost-estimation. Common
reasons include lack of trust for the BIM, the BIMs unclear legal status and quality, and
that the existence of traditional 2D-drawings makes it possible to still use “tried and
tested” methods. By using Total BIM, the time taken to perform cost estimations may
be reduced up to 90% over traditional methods, but issues regarding training, data and
information management and education must be addressed. Greater investment is also
necessary in early project stages.
Beskrivning
Ämne/nyckelord
Total BIM, Cost estimation, BIM, Digital Construction