Title:
Analysis of the State of the Art of 5D BIM for lifecycle cost estimation, cost control, and payments

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Onungwa, Ihuoma
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Pishdad-Bozorgi, Pardis
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Abstract
The creation of an integrated system for cost estimation, cost monitoring, cost control, and payments in the construction development life cycle has become critical due to rising expectations for efficiency in the execution of construction projects and the adoption of lean production processes in construction. Existing 5D BIM tools are mainly used to estimate the cost of projects during the preconstruction period. There is a lack of integration between the 5D BIM models, existing progress monitoring tools, and payment systems used in construction. This leads to a lack of interoperability in cost estimation during the preconstruction stage and cost-control during construction. With 5D BIM, the construction delivery process can be standardized to enhance the monitoring and management of cash flow in a project’s delivery lifecycle. Lack of standardization in the use of model elements through the project lifecycle has also been identified as one of the factors limiting automation in 5D BIM. Construction project monitoring can be automated by combining modern technologies that allow for visualization of building progress (Laser scanners, computer vision) with 5D BIM cost estimation tools. These project monitoring tools can be combined with Artificial Intelligence (AI) to develop an integrated lifecycle system for cost management in construction. This paper examines existing systems used in 5D BIM to develop integrated practices and systems that will streamline the process of cost estimating, cost monitoring, cost control, and cash flow in the construction supply chain. This will reduce the inefficiency that exists today with traditional contracts and payment applications that do not interact with the 5D BIM application. By leveraging a standardized classification ID system throughout a project life cycle and applying AI and smart contract, features like cost estimation cost control, and payments can be fully streamlined, integrated, and automated. A case study of an existing construction project utilizing 5D BIM was examined. According to the study, 5D BIM is currently used primarily in the pre-construction stage of a project for cost estimation. The case study also revealed that 5D BIM improves project cost visualization and budget control. This paper focuses on the State of Practice for 5D BIM through literature review and case study. The study has some limitations due to the use of only one case study. The proposed workflow still needs to be validated. It will be applied in future research.
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2022-12-23
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