Generating a Daily Bill of Materials at Level of Development 400 Using the Smallest Workface Boundary
Publication: Journal of Construction Engineering and Management
Volume 146, Issue 5
Abstract
Observations and sample tests at five construction sites showed that the time required for generating a daily bill of materials (BOM) is within the range of 12–68 min. However, 20 foremen interviewed at the sites stated that, in reality, they cannot spend more than 2–3 min per day generating a daily BOM, although this information would be helpful for field control. To meet this time requirement, this study uses a building information model at level of development (LOD) 400, i.e., the fabrication level, and a concept referred to as the smallest workface boundary (SWFB), which is the boundary that encapsulates a set of LOD400 objects in the smallest workable unit to overcome their high granularity. This research also presents four types of rules to automate the generation of SWFBs to the extent possible from LOD400 objects. The SWFB concept and rules are incorporated into a protype to aid a foreman in quickly generating a daily BOM with LOD400 objects. A methodology that a foreman can use with the prototype is also provided. For validation, field experiments were conducted at sites in Abu Dhabi, Stockholm, and Lima. With the latest version of the prototype, the time requirement (i.e., not requiring more than 2–3 min per day) was met with an average of 59 s.
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Data Availability Statement
Some or all data, models, or codes used during the study were provided by a third party (the project owner of each field experiment has ownership of the LOD400 model files used in this research). Direct requests for these materials may be made to the provider as indicated in the Acknowledgements.
Acknowledgments
The authors would like to thank Consolidated Contractors Company, Drees & Sommer, Allegro Projekt AB, Quality Consulting Solutions, and Proisac for providing access to their sites and the resources needed for the field experiments.
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©2020 American Society of Civil Engineers.
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Received: Mar 30, 2019
Accepted: Oct 15, 2019
Published online: Feb 25, 2020
Published in print: May 1, 2020
Discussion open until: Jul 25, 2020
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