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From page 28... ...
The following sections discuss each of the reviews in detail, including specific guidance and procedures for conducting design reviews within a 3D model environment. • Design compliance includes survey reviews, discipline-specific design reviews, and clash detection and spatial coordination reviews.
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A modeling standards review looks at compliance with the agency's CADD/BIM/model development standards, and a model integrity review looks at the model structure. These reviews need to be conducted prior to checking 3D models for design compliance.
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This section describes the survey, discipline design, and clash detection/spatial coordination reviews; the scopes of these reviews; and the types of documents and reference standards involved in the reviews. (For more detailed sample review procedures along with the core competencies needed to conduct each type of review, see Appendix E.)
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Table 4 indicates the applicability of reference standards and other review documents for the defined survey review categories.
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Agency CADD standards Check compliance and provide guidelines for consistency in the development of technical drawings, including file structure, data management and drawing templates, file naming conventions, and the use of libraries that establish layering, styles, and symbology conventions as well as 2D and 3D standards. Project design layout Provides information for spatial relationships of design features.
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Review Information Table 5 outlines reference standards and other documents required to complete this review. 4.3.3 Clash Detection and Spatial Coordination Review Scope of Review This review involves analyzing each discipline-specific model to evaluate the position of its model elements in relation to each other and in relation to the model elements from other discipline-specific models.
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Table 6. Documents for clash detection and spatial coordination review. Document Purpose National design standards Provide knowledge of required national standards (if applicable)
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Discipline model manager oversees and executes modeling for a specific discipline. They are responsible for confirming that the discipline-specific model meets the modeling standards and for performing routine modeling standards, model integrity, and discipline design reviews, as defined in the BEP.
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Design compliance reviews require a primary design skill set with sec ondary skills in navigating and manipulating 3D model content. Model integrity and modeling standards reviews require a primary 3D modeling–skill set with secondary skills in the discipline.
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This format offers small and large utility owners an opportunity to interact with and support one another, under the coordination of DOT staff. 4.5 Review Process and Preparation This section describes how the addition of 3D model–based design reviews affects the traditional quality management timeline.
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However, model integrity reviews do not affect the project design; therefore, they should occur when preparing a model for design review. The review preparation process is as follows: • Model authors check their work by comparing a model to the calculations and checking the modeling standards and model integrity.
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From page 39... ...
• Generating a review artifact that provides a record of what was checked, when it was checked, and who checked it. 4.5.4 Standardizing Clash Routines The scope of and reference documents for clash detection are provided in Section 4.3.3, and sample clash detection–review procedures are available in Appendix E
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