Personally struggled with this for my MP3DP v4. Have been trying to document/share part counts in my build not covered by MP3DP v4 - V1 Engineering Documentation , has been tricky to track. Partly because am not experienced, but mostly because everyone’s printer seems to be uniquely built. e.g. Most seem to be built with Corner brackets, some (like Triscious and Mike) built using Blind Joints, I personally tried both.
Already seen the Mp3dp v4 bom topic? That helped me piece together an initial order list when getting started.
Am at the point where am ordering bolts/nuts by the hundred(s), and using bunch of containers to organize stuff, am hoping to build more projects over time to get through bolts/nuts/hardware that doesn’t end up being a family heirloom.