My work is to describe projects such that contractors can calculate them and give a correct price. For me simplebim is a perfect tool for grouping objects and picking quantities. I simply add our own tags to elements to enable easy filtering and sorting in Excel. We also work in parallel with the architect because the architect is never finished when we have to start our work. When I get an updated IFC file from the architect I use simplebim to easily transfer our tags from the old IFC file to the new one.