I am fairly new to design tables. I understand how they work and I know how to add parameters by double clicking on the dimension. I have a DT driving an assembly with about 10 simple parts in it. I would like to add the weights of the parts that are of the same material together so I can get weight totals by material. Since the weight of a part does not show up as a dimension that you can click on, I have to add it to the table manually. The help says to use "$sw-mass". I understand this will work in a part but I am in an assembly. Wouldn't the proper name be "$sw-mass@partname"? I tried that and it said my column heading had an invalid feature name. I don't want the mass of a feature I want the mass of a part. As a test I made a simple square part, assigned it a material, and inserted an autogenerated DT. I entered a parameter called "$sw-mass" and the cell below it stayed blank. Shouldn't the mass have showed up? What is the correct way to get a part's weight into a DT? Thanks.