Rakentamisen määrätietojen hallinta tietomallihankkeessa
Research output: Book/Report › Doctoral thesis › Monograph
|Publisher||Tampereen teknillinen yliopisto|
|Number of pages||128|
|Publication status||Published - 27 Oct 2017|
|Publication type||G4 Doctoral dissertation (monograph)|
|Name||Tampereen teknillinen yliopisto. Julkaisu|
The construction information technology works as a main theoretical framework for this study. The motivation for this study is based on several years of observations made in building projects, where quantity information was produced repetitively during the construction process. The study examines two hypotheses: the building information modeling techniques can be used to reduce overlapping work in quantity take-off and standardized practices can serve the practical needs in a verified manner so that the duplicate work is reduced.
This research uses a case-study method to approach real world problems. A case study is descriptive and explanatory in nature. The theoretical starting points are examined through literature, research, data models and quantity take-off instructions. In the empirical part residential building projects are used as case subjects. The empirical part has three point of views: quantity take-off solutions, quantity take-off processes and the procurement quantity take-off. In quantity take-off part the data was collected from 20 construction projects and procurement quantity take-off part had three case projects. In this research the building information models are considered to be a tool to produce quantity information to different stakeholders in the construction project. Software specific technical details are not included to the themes for the research. A specific building object (drywall) was used as an example object of the quantity take-off process.
In the empirical part was observed that the quantity estimation work was reduced over 50% when using the building information model tools compared to an approach without any building model tools. This result is achieved for the example object and for the whole building the quantity take-off time can be reduced 20%.
The study presents an operating model: transparent quantity take-off management (LMH), which connects the cognitive needs of the quantity takeoff and data modeling tools to a mutually supportive entity. The purpose of the LMH is to improve the utilization of the data model quantity information in quantity take-off process and also in other construction processes.
Further studies are needed to investigate how throughout procurement phase the actual bill of materials can be integrated to the quantity data present in the data models. Additionally better integration mechanisms should be developed to transfer the quantity data of digital building models between different software packages.
- building information model, building information modeling, quantity surveying, quantity take-off