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안정환,임진강,오민호,이재욱,Ahn, Junghwan,Lim, Jinkang,Oh, Minho,Lee, Jaewook 한국BIM학회 2015 KIBIM Magazine Vol.5 No.2
As buildings become larger and more complicated, construction costs have increased with a considerable effect on buildings' Life Cycle Cost (LCC). However, there has been little consideration on economic aspects in the selection of construction materials due to limited information on the materials and dependency in architects' experience and inefficiency in cost estimation, causing design changes, increase in maintenance cost, difficulty in budgeting, and decrease in building performance. To solve these problems, this study proposed a BIM-based material selection model which reflects the comprehensive economic efficiency of building materials. Our cost prediction model can estimates the material-related cost during the entire building life cycle. Furthermore, we implemented the proposed model in connection with BIM, which can analyze and compare LCC by material. Through the validation of the model, we could confirm the necessity of LCC-based material selection in comparison with the conventional cost-centered material selection.
조용식(Yongsik Cho),안정환(Junghwan Ahn) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.1
The manufacturing equipmenton most shop floorsconsists of numerical control machines,and the condition of each piece of equipment is monitored and controlled by an internal sensor or programmable logic controller (PLC). To control and monitorproduction lines that consist of an equipmentor production module, a separate control and monitoring system such as a manufacturingexecution systemshould be introduced. However, there is no standardized system, and it is costly and difficult to build a system for small or medium-sized plants. In this paper, a PLC-based supervisory system for operation control of a group of production machines is proposed, and the developed PLC-based system is evaluated by applying it to a computer numerical control machine.