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Best practice for modeling in regards to tolerances?

Question asked by Joe Dunfee on Jan 8, 2009
Latest reply on Jan 8, 2009 by John Matrishon
I am fairly new to high precision manufacturing, so haven't really had to deal with this issue before.

When modeling a part, do you model it at the average size for a part, or do you model it at maximum material so that any worst-case interferences are apparent?

E.g. I have a part 2" +.001" / -.005" Diameter. Should I model it at 2" Dia, or perhaps 2.001" Dia?

I know I can indicate the tolerances on the sketch, and bring them into the drawing. But, I am thinking about the model itself at the moment.

Joe Dunfee