Up until now I really liked working with open project, but I am missing an essential feature right now. I would like to keep track of  some key performance indicators (KPIs) like the earned value and I did not find anything about this in open project.  

Is there a feature for that ( maybe in the Enterprise Edition) ?

Hi,
At the moment this could only be done manually or with workarounds.
Please feel free to create a feature request for this.

Kind regards

very important weakness or lack