Fitting tolerance

 From:  DannyT (DANTAS)
3219.1 
Hi Michael,

I'm starting to hear the fitting tolerance of 0.001 being mentioned more lately, can this tolerance be adjusted to handle smaller objects and what effect will that have in MoI, will it take longer to calculate an operation, like if you made the fitting tolerance 0.0005 or even 0.0002 what will that do ?
In NX6 there is a fitting tolerance that is adjustable by the user, currently our company standard is 0.0002"(0.005mm) is this the same thing?

Just curious :)

-
~Danny~