Usng the Sigmetrix modules will give you a report on how the tolerances on individual parts could interfere or become too large of a gap at the assembly level. It basically takes the parts and runs them through their tolerance limits in conjunction with your other components.
It does take some training to understand the system and consistent use to hone your skills. The analysis set up in Sigmetrix also takes some time, but may be better now, since I haven't used it since WF1 in 2005.
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