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This paper proposes a BIM-based workflow to optimize MEP layout from preliminary design into construction, building models across five levels of detail and applying four optimization method types to address constructability issues, validated through a case study.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & 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does BIM-based MEP layout optimization often fail after reaching construction?","Question",{"text":62,"@type":63},"Because BIM applications commonly end at design stages, construction spaces may differ from design assumptions due to as-built deviations, causing layouts optimized for design to misfit installation conditions.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"What BIM models are developed in the proposed framework?",{"text":67,"@type":63},"Five levels of detail are used: 3D MEP preliminary design model, 3D MEP detailed design model, 3D MEP construction design model, MEP construction model, and MEP prefabrication model.",{"name":69,"@type":60,"acceptedAnswer":70},"How is the proposed BIM approach evaluated?",{"text":71,"@type":63},"A case study is implemented to validate the framework, and results indicate BIM can improve MEP layout efficiency and reduce costs while emphasizing construction preparation and construction stages for successful 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[wangjun19891224@126.com](wangjun19891224@126.com)  \nSchool of Construction Management and Real Estate, Chongqing University, China  \nAustralasian Joint Research Centre for Building Information Modelling, School of Built Environment, Curtin University, Australia  \nXiangyu Wang, Professor, [xiangyu.wang@curtin.edu.au](xiangyu.wang@curtin.edu.au)  \nAustralasian Joint Research Centre for Building Information Modelling, School of Built Environment, Curtin University, Australia  \nWenchi Shou, Master, [shouwenchi@126.com](shouwenchi@126.com)  \nSchool of Construction Management and Real Estate, Chongqing University, China  \nAustralasian Joint Research Centre for Building Information Modelling, School of Built Environment, Curtin University, Australia  \nJun Guo, BIM Director, [guo.jun@ccdi.com.cn](guo.jun@ccdi.com.cn)[ ](guo.jun@ccdi.com.cn)CCDI Company, China  \nABSTRACT  \nBuilding Information Modelling (BIM) has demonstrated its advantages in improving Mechanical, Electrical and Plumbing (MEP) layout in such as preliminary design and detailed design stages. Unfortunately, BIM applications normally stop prior to the construction stage, and the downstream stages have seldom become the arena of BIM applications. Therefore, the MEP layout optimal design from BIM will no longer fit properly to the installation space if there are as-built deviations in the construction of these spaces. This paper presents an approach of utilizing BIM to optimize MEP layout from preliminary design into construction phase. In this framework, BIM models are developed at five level-of-details: 3D MEP preliminary design model, 3D MEP detailed design model, 3D MEP construction design model, MEP construction model and MEP prefabrication model. Four types of optimization methods have been developed to demonstrate solving constructability issues. A case study is implemented to validate this BIM approach framework. The results show that BIM can efficiently improve MEP layout and reduce cost, and construction preparation stage and construction stage should be paid more attention so as to insure MEP installed successfully.  \nKeywords: BIM; MEP; layout; optimization  \n1. INTRODUCTION  \nNowadays, Mechanical, Electrical, and Plumbing (MEP) systems become more complex in design and design coordination which requires more space available for installation. Conversely, the available clearance space in buildings is limited due to the economic and energy-efficient consideration. Therefore, the coordination of MEP systems has become a major challenge particularly in complex properties such as high-rise commercial buildings, large-scale public buildings and infrastructure. MEP coordination involves locating equipment and routing Heating, Ventilating, and Air-Conditioning (HVAC) duct, pipe, and electrical raceway in a manner that satisfies many different types of criteria (Speidel, Simonian et al. 2008) . In the current MEP coordination process, designers among mechanical, electrical, and plumbing are generally lack of cooperation, so as many collisions to occur. The traditional MEP coordination practice uses a process of sequentially overlaying and comparing drawings for multiple systems, during which representatives from each MEP trade work together to detect and eliminate spatial and functional interferences among MEP systems (Korman and Tatum 2006) . Such multi-discipline effort is time-consuming and expensive (Korman and Tatum 2006; Speidel, Simonian et al. 2008) .  \nWith the emergence of Building information modelling (BIM), current MEP coordination process is now able to evolve with this technology. In the last 10 years, considerable efforts have been made to use BIM for MEP coordination. Those works can be divided into four main categories:  \n(1) Knowledge and reasoning for MEP coordination based on BIM/3D CAD (Korman, Fischer et al. 2003; Tabesh and Staub-French 2005; Tabesh","cbCaiosz8Ev17Uc8","https://ap.wps.com/l/cbCaiosz8Ev17Uc8","pdf",614849,"English","# 1. INTRODUCTION\n## MEP coordination challenges and limitations\n## BIM-enabled evolution of MEP coordination\n## BIM-based MEP layout optimization gap toward construction\n# Proposed approach and framework overview","[{\"question\":\"Why does BIM-based MEP layout optimization often fail after reaching construction?\",\"answer\":\"Because BIM applications commonly end at design stages, construction spaces may differ from design assumptions due to as-built deviations, causing layouts optimized for design to misfit installation conditions.\"},{\"question\":\"What BIM models are developed in the proposed framework?\",\"answer\":\"Five levels of detail are used: 3D MEP preliminary design model, 3D MEP detailed design model, 3D MEP construction design model, MEP construction model, and MEP prefabrication model.\"},{\"question\":\"How is the proposed BIM approach evaluated?\",\"answer\":\"A case study is implemented to validate the framework, and results indicate BIM can improve MEP layout efficiency and reduce costs while emphasizing construction preparation and construction stages for successful installation.\"}]","AN APPROACH OF UTILIZING BUILDING INFORMATION MODELING TO OPTIMIZE MEP LAYOUT - Abstract and Introduction | PDF",25]