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Namhyuk Ham
Department of Digital Architecture and Urban Engineering, Hanyang Cyber University, 220, Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea

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Journal article
Published: 29 March 2021 in Sustainability
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The frame construction of an apartment complex that consists of multiple buildings encounters various uncertainties, owing to the complex relationships between units of work. Currently, the period of such a construction is calculated based on the number of floors of the highest building in the complex. This study quantitatively analyzes an apartment frame construction period using a queue model and evaluates the validity of the estimated period. In this regard, a methodology is proposed for analyzing the construction period by applying the concept of a customer and a server. A case study on the duration of an apartment frame construction period is conducted with the Korea Land and Housing Corporation, which has supplied the largest number of apartments in South Korea. It was found that the stable state of a queue system was observed when the rate of server utilization was applied to the basement and above-ground floors. However, a stable state was not reached on the ground floor. This study includes non-working days in its calculation and quantitatively analyzes uncertainty factors during construction. Therefore, the findings can be practically utilized to quantitatively plan the durations of work units in an apartment frame construction.

ACS Style

Jin-Won Kim; Namhyuk Ham; Jae-Jun Kim. Quantitative Analysis of Waiting Length and Waiting Time for Frame Construction Work Activities Using a Queue Model; Focusing on Korean Apartment Construction. Sustainability 2021, 13, 3778 .

AMA Style

Jin-Won Kim, Namhyuk Ham, Jae-Jun Kim. Quantitative Analysis of Waiting Length and Waiting Time for Frame Construction Work Activities Using a Queue Model; Focusing on Korean Apartment Construction. Sustainability. 2021; 13 (7):3778.

Chicago/Turabian Style

Jin-Won Kim; Namhyuk Ham; Jae-Jun Kim. 2021. "Quantitative Analysis of Waiting Length and Waiting Time for Frame Construction Work Activities Using a Queue Model; Focusing on Korean Apartment Construction." Sustainability 13, no. 7: 3778.

Journal article
Published: 01 October 2020 in Sustainability
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This study proposed a phased reverse engineering framework to construct cultural heritage archives using laser scanning and a building information model (BIM). This framework includes acquisition of point cloud data through laser scanning. Unlike previous studies, in this study, a standard for authoring BIM data was established through comparative analysis of existing archives and point cloud data, and a method of building valuable BIM data as an information model was proposed. From a short-term perspective, additional archives such as member lists and drawings can be extracted from BIM data built as an information model. In addition, from a long-term perspective, a scenario for using the cultural heritage archive consisting of historical records, point cloud data, and BIM data was presented. These scenarios were verified through a case study. In particular, through the BIM data building and management method, relatively very light BIM data (499 MB) could be built based on point cloud data (more than 917 MB), which is a large amount of data.

ACS Style

Namhyuk Ham; Baek-Il Bae; Ok-Kyung Yuh. Phased Reverse Engineering Framework for Sustainable Cultural Heritage Archives Using Laser Scanning and BIM: The Case of the Hwanggungwoo (Seoul, Korea). Sustainability 2020, 12, 8108 .

AMA Style

Namhyuk Ham, Baek-Il Bae, Ok-Kyung Yuh. Phased Reverse Engineering Framework for Sustainable Cultural Heritage Archives Using Laser Scanning and BIM: The Case of the Hwanggungwoo (Seoul, Korea). Sustainability. 2020; 12 (19):8108.

Chicago/Turabian Style

Namhyuk Ham; Baek-Il Bae; Ok-Kyung Yuh. 2020. "Phased Reverse Engineering Framework for Sustainable Cultural Heritage Archives Using Laser Scanning and BIM: The Case of the Hwanggungwoo (Seoul, Korea)." Sustainability 12, no. 19: 8108.

Journal article
Published: 07 February 2020 in Applied Sciences
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In off-site construction, production of fabrication drawings has a very important impact on productivity. Documentation using 3D model is one of the great advantages of using BIM. Despite the importance of documentation based on 3D model, productivity analysis studies compared to traditional 2D-drawing-based documentation method are difficult to find in existing studies. In addition, empirical research on the effects of recycling 3D model and libraries information is hard to find. The purpose of this study is to analyze the productivity of documentation using 3D model in the fabrication phase. First, productivity data for the 2D-drawing-based documentation method and 3D-model-based documentation method for steel frame prefabrication of EPC project were acquired for each module. Second, additional time for tasks—such as 3D modeling and document review—were investigated to conduct the comparative analysis on the productivity of the two documentation methods. The results quantitatively show the productivity of 3D-model-based documentation and the learning effect of recycling 3D libraries.

ACS Style

Mooyoung Yoo; Namhyuk Ham. Productivity Analysis of Documentation Based on 3D Model in Plant Facility Construction Project. Applied Sciences 2020, 10, 1126 .

AMA Style

Mooyoung Yoo, Namhyuk Ham. Productivity Analysis of Documentation Based on 3D Model in Plant Facility Construction Project. Applied Sciences. 2020; 10 (3):1126.

Chicago/Turabian Style

Mooyoung Yoo; Namhyuk Ham. 2020. "Productivity Analysis of Documentation Based on 3D Model in Plant Facility Construction Project." Applied Sciences 10, no. 3: 1126.