I often need to calculate the total amount of zone areas and compare it to some max area. I can sum zones using schemes but there is no way to do the comparison. I need this to be done automatically, not by manually typing the result to a text. I wish that Graphisoft would upgrade massively the functionality of schemes and provide us a excel-like scheme.
This can easily be done via the Python API and has been demonstrated here by several people with different approaches. Mostly using Zone areas and custom properties. As to Graphisoft's promises for "Calculations in Interactive Schedules", I remain skeptical that anything useful will be provided other than a minimum calculator. Seems like a long time to wait for nothing significant (years away?)? Note: that Graphisoft has not bothered to even solicit any input on this feature and i doubt that they ever will