19 Mai 2018 Jahr - 5. Tracking the Built Status of MEP Works: Assessing the Value of a Scan-vs.-BIM System

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This paper explores that opportunity. A Scan-versus-BIM processing system is described with some
enhancements over previous works. It is then tested with a representative and challenging case study of the construction of a utility corridor in
a university engineering building. The results indicate that the proposed system is significantly challenged when tracking MEP systems
constructed using traditional on-site fabrication, due to changes or adjustments made on-site that lead to actual component layouts varying
in comparison to designed layouts. This performance could be revisited in cases where off-site prefabrication and preassembly is implemented.
The results nonetheless lead the authors to propose a novel data processing system (conceptually described in this paper) integrating
Scan-versus-BIM and Scan-to-BIM approaches. This system should provide superior performance over existing systems, enabling automated
and robust quality control (including the estimation of the emerging performance metric percent built as designed) and delivery of true
as-built BIM models to facility owners and managers.
https://ascelibrary.org/doi/full/10.1061/%28ASCE%29CP.1943-5487.0000343

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