buildingSMART alliance BIM Information Exchange Demonstration

BIM Information Exchange Demonstration

JULY 23-25, 2008

CVIE Implementation Testing: AutoDesk
Navisworks with Revit

by Nicholas Nisbet MA (Cantab) DipArch (UNL) - AEC3 and William East, PE, PhD - Engineer Research and Development Center, U.S. Army Corps of Engineers

The following table provides the analysis conducted to evaluate software manufacturer compliance with the Construction Operations Building Information Exchange (COBIE) conducted for the 23-25 July 2008 Building Information Modeling Information Exchange Demonstration.

The CVIE requirements include provision of a clash detection report with each design deliverable. Hard- (physical co-location) and Soft- (using clearance distances) should be included in the clash analysis. To allow an independent analysis of clash detections the CVIE requirement also asks for a copy of the IFC 2x3 Coordination View file.

AutoDesk CVIE File using direct submission to report

Software Name Navisworks with Revit
Software Version Not provided by vendor during the meeting.
Optional configuration(s) Not provided by vendor during the meeting although the information was explicitly requested prior to the meeting. Please contact the vendor directly for this information.
Revit source file used
COBIE XLS spreadsheet
Checker file results
Qualitative Evaluation
   Proxy component ratio
  • 39.340 % =1820 / 4624 (poor)
   Unnamed component ratio
  • 0.865 % = 40 / 4624 (good)
   Interference record
  • Clash number, coordinate, status and approval
  • Clash distance
  • Illustration of objects without context
   For each item
  • (Sub-model) File and Layer i.e. "MEP Level 1"
  • (Instance/Type) Name i.e. "W14X22"
  • (Geometric) Type i.e. "Solid / Composite Part"
Additional Comments The sample file submitted included architecture spaces, sanitary, equipment and HVAC systems.
Navisworks can also be used to read and analyze IFC files.

Implementation Support

Some local software manufacturer sales representatives may not be familiar with the performance-based, open-standard information exchange formats tested during the July 2008 meeting. As a result, these sales representatives may not be able to assist your use of this format. It is suggested that users contact vendor technical support and request "higher tier" technical support services.

There are also several third-party support contractors who have been involved in the development of these formats that could be of assistance. For information about these contractors, please post a request for assistance on the buildingSMART alliance list service. You will need to join the Alliance to use this service.

Another resource that might be helpful is a peer-to-peer forum supporting the Model Support Group of the International Alliance for Interoperability's ( The purpose of this forum is to help users find and share answers to their own questions regarding IFC-based information exchanges. This forum was used during the vendor communications leading to the July 2008 demonstration; as a result vendor technical staff may be reviewing forum postings to support their users. You must register, and be approved, for this forum however use of the forum is free of charge, at this time.


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