Development of schematic estimation system through linking QTO with cost DB

Abstract

Cost estimate in architectural projects is an important factor for decision-making and financing the project in both early design phase and detailed design phase. In Korea, estimate work based on 2D drawing has generated problems of difference form QTO according to worker's mistake and know-how. In addition, 2D-based estimation are obtained uncertainty factors of estimation depending on lack of information due to becoming larger and more complex than any other project of the architectural project. In order to solve limitations, this study is to suggest an open BIM-based schematic estimation process and a prototype system within the building frame through linking QTO and cost information. This study consists of the following steps: 1) Analysing Level of Detail (LoD) to apply to the process and system, 2) BIM modelling for open BIM-based QTO, 3) Verifying the quality of the BIM model, 4) Developing a schematic estimation prototype system. This study is expected to improve work efficiency as well as reliability of construction cost. © 2016 All rights reserved and published by The Association for Computer-Aided Architectural Design Research in Asia.