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Guide for Digital As-Builts Using Simplified Digital Workflows
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2024-07-01
[PDF-959.52 KB]
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Abstract:As-built drawings have long served as a critical construction documentation that captures how a project was actually built, noting deviations from the original plans and any changes made during construction. Traditionally the transportation agencies have used two-dimensional (2D) paper sheets, image scans, and document-based PDFs for as-builts. Technological advancements have led to the use of 3D as-built drawings. These 3D models represent a significant leap forward, offering more than just visual representations. As data-rich repositories containing detailed project and asset information, they serve as a key link between project design, survey, and construction data, connecting them to ongoing operations and asset management. Many transportation agencies have made significant strides in digital delivery to create a comprehensive digital ecosystem for the lifecycle management of highway infrastructure, and digital as-builts (DABs) is one among them. Implementing DABs requires a systematic approach that addresses key requirements related to processes, people, tools and technologies, and data, which, when met, enables agencies to formulate effective workflows for DAB implementation. State Departments of Transportation (DOTs) employ a range of practices that significantly vary based on their specific project delivery and asset management needs and capabilities. Despite the diversity, these practices can be broadly categorized into two main workflows: the Simplified Lifecycle Digital Workflow and the Integrated Digital Workflow. Both workflows aim to develop DABs, but they differ in their complexity and integration of design and data collection processes. The Simplified Digital Workflow is a straightforward approach that separates the design process from the data collection process, which is undertaken using data templates during the construction phase. The Simplified Digital Workflow stands in contrast to the Integrated Digital Workflow, a more comprehensive approach, that intertwines the design process and data collection, making asset data a core component of the digital design model. This guide presents a detailed discussion of the steps involved in the Simplified Digital Workflow with illustrative examples drawn from various State DOTs.
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