SU Solid computations

[jgb]

Just curious; What is the methodology SU uses to compute a complex shaped solid's volume?

And... what is it's margin of error?

Just a "how" will suffice, I'm not looking for the algorithm.

There are several methods, with varying degrees of accuracy. Several using a myriad of slices. SU seems way too fast to micro-slice a complex object and give an accurate value.

I'm getting to a stage in 2 of my extensive models where I have to make a fairly accurate estimate of component weights, and I need to know what level of accuracy I am getting.

What set this off was my model of a special part weighing about 22 pounds taken from a suppliers very detailed dimensioned description of it, and our comparative weight calcs were off by just under 3%. Not much you say, but 3% is 48,000 pounds of variance on my big freighter airplane project. That is almost 200 passengers and their baggage, or 300 miles in range.

I fully realize I will not get a truly accurate total weight in any of my projects. They are conceptual drawings, not shop drawings, but still, I need to be able to say I am about 1% or better in my estimations to validate the concepts as feasible, from a weight standpoint, at the very least.