Comment by plafl

What I remember from college, more than 10 years have passed, from using MicroStation and SolidEdge is that even professional design packages will accumulate some errors. Actually you could build the same piece in several different ways and some ways were more precise than others. My understanding is that all operations are carried numerically and the only way that would prevent accumulation of errors would be to perform them symbolically and solve them numerically just at the end but I suppose that would be extremely inefficient. I wonder if someone knows about any book or software library that follows the later approach since I find the subject quite interesting.