Domenico Spano

In the Multidisciplinary BIM design, the Architecture, Structures, MEP Models (various) executed on Autodesk Revit platforms, during the BIM technical and operational development phase, will be processed or updated on a data sharing platform (CDE/ AcDat) such as Autodesk Construction Cloud through which it will be used to update the progress of the individual workings of the shared BIM models and to be aggregated for Coordination checks (possibly also receiving IFC Models executed with other Software). The BIM Coordination platform for Clash Detection and 4D operations (Time Line and Gantt) used is Navisworks Manage Autodesk, dialoguing bi-directionally with Revit Autodesk, and viewing geometries and data also of IFC formats and is used to trace the construction clashes of the Aggregated BIM model. In addition, for a correct and shared coordination of the BIM process the following should be noted: all communication and sharing of models and project documentation takes place only through the CDE/AcDat platform, access to which will be regulated by the CDE Manager according to the responsibilities and tasks defined in the pGI/BEP. The format of the interchange files, for the first and second and third level coordination verifications, will be native authoring .rvt and also .nwc .nwd .nwf files as the Clash Decisions will be carried out through the Navisworks software, from which the results reports will be processed in open interchange format .pdf or .xml, or .html useful for sharing and identifying the single points of interference within the single models and carried out by the BIM Coordinator under the supervision of the BIM Manager. The verifications of the IFC models, will be of a formal type since, although they are open format files, they do not allow direct modifications except by returning to the Autohoring software. The individual verification reports associated with the various disciplines and the federated model will always be available for analysis and resolution by BIM Coordinators and BIM Managers. Analysis and resolution of interferences and information inconsistencies is carried out by means of the defined clash matrices and are subdivided by discipline and by object of verification including: Object/Object: single 3D element belonging to a model - Model/Model: set of 3D elements - Elaborates/Elaborates: graphic elaborates, which can be extracted from the model or produced without using the model. The procedure by which the issues (problems) are catalogued and communicated to the responsible teams is as follows: from the identification of issues with a high and medium priority level, therefore characterised by variations in cost and/or design, an operational workshop (aimed at analysing the problem) is held with the various design managers and the contracting station, in order to share the problem encountered and the relative solutions identified so as to collaboratively analyse them and jointly identify the solution that best suits the relative issue encountered. This solution is considered indispensable in order to optimise the collaboration between the parties, making the workflow immediate and functional for the achievement of the objectives set. To this end, the contracting station will be updated promptly following the identification and classification of issues through Trasmittal containing the report of inconsistencies and project interferences, filtered according to the priority level classified as "high" and/or "medium". The contractor shall then make this information available to the contracting station via a CDE/ACDat chosen such as Autodesk Constuction Cloud, giving access to the appropriate reporting folder and sharing the coordination and resolution operations. As resolutions are carried out on Revit Models or backwards on the Software from which the IFCs originate, new Clash Detection in Navisworks will be automatically resolved with a minimisation of clashes to be approved and overlooked and reliable resolution reporting that the aggregated Model is free of clashes and inconsistencies.