## 5 BIM-Enabled Asset Information Delivery Process
* _Validation of the Asset information in BIM (compliance with BIM Requirements)_  
Current workflows employed by designers during BIM development do not necessarily result in asset information that can be used by the asset owners. This misalignment between the conventional way designers use BIM for their own purposes and how they are expected to use BIM to deliver asset information creates the need for a validation process involving the asset owner. This validation process occurs concurrently with the model development to ensure that the owner's information requirements are met and prevent the accumulation of issues at the end of design. In project A, this validation process was conducted by the BIM consultants. The models were periodically reviewed against the BIM requirements, and a compliance report was provided to the design team with a list of issues that required their attention. Figure 10 shows the timeline of project A with seven model reviews and five BIM-related meetings that took place during design. Figure 10 also shows when each of the five versions of the models were submitted relative to the scheduled design development milestones. To improve the QA/QC of the models, the design team employed the Autodesk model checker plugin for Revit. This tool was used for (a) General model checks covering file characteristics, model settings, and restricted elements, (b) Discipline-specific category checks to verify elements that should or should not exist in each category, (c) Checking discipline-specific parameter requirements per the DGS, and (d) Family and type naming checks covering mandatory and restricted terms. Figure 9: Partial screenshot of the DGS spreadsheet showing the expected LoD for each category of object at a certain phase of the project. The DGS spreadsheet was fundamental for this step, during which specific data requirements were defined for each category of BIM object. Figure 11 shows an example of different data parameters required in the DGS being incorporated in the respective categories of objects in BIM. Ideate BIMLink, a plugin for Revit, was used to create and export schedules with parametric data, which allowed data import using Excel spreadsheets. The Autodesk Classification Manager plugin for Revit was used to populate classification information that was difficult to access in Revit, such as the assembly code and OmniClass number. As well as supporting FM activities, the additional information required in the DGS enabled BIM to be used as a tool for the design reviews. Model updates based on design changes during constructionThe deviations from design that happen during construction that affect the required asset information need to be captured and incorporated into the design models in an ongoing manner. This is to ensure the accuracy of the asset information in BIM for downstream use. To define what changes are sufficiently relevant to be incorporated into the design models, the BIM consultants provided an accuracy table that defined the tolerance of acceptable  
Figure 11: Schematic example of the asset information required in the DGS being incorporated into the Revit models during design. Figure 10: Timeline of the BIM compliance process during design. deviations between the fabrication models, as-built conditions, and design models. When the deviation exceeded the defined tolerance, the contractor was required to provide the designers with red lines that were used to update the design models. As part of the BIM-enabled asset information development process, it was expected that the trades would produce fabrication models that could complement the asset information from the design models. Although these fabrication models provided an additional level of detail in terms of geometric information for specific systems, which was useful for virtual coordination, there was no additional semantic information captured. Therefore, these fabrication models were not used directly to provide asset information.