[CAD Note] BIM issues.

Inherent to BIM is parametric design software tied to data contained in spreadsheets. Changes made to either the digital model or the database automatically update and coordinate throughout the model and spreadsheet.
Due to the extent of the previsualization it allows prior to construction, BIM reduces errors and generates savings for Clients.
But in practice benefits will not be realized without some possibly serious drawbacks.
While BIM possesses fairly powerful tools for error reduction, it is simply incapable of error elimination.
Thus underscoring that for architects there is a distinct danger that bim will result in a triple-whammy: more-work, less profit, and increased liability.
Full BIM modeling for singular enterprises is ultimately not beneficial for architects, since the time (and thus, cost) of such a complex endeavor is much higher than normal one-off design services.
Development of a full BIM model is almost as complex as physically making the actual object and one that makes economic sense only in a mass-production / customization context.