Boundary conditions

Depending upon its function, a feature of size is controlled by its size and any applicable geometric tolerances. Material condition (RFS, MMC, or LMC) may also be applicable. Consideration must be given to the collective effects of MMC and applicable tolerances in determining the clearance between parts (fixed or floating fastener formula) and in establishing gage feature sizes. Consideration must be given to the collective effects of LMC and applicable tolerances in determining guaranteed area of contact, thin wall conservation, and alignment hole location in establishing gage feature sizes. Consideration must be given to the collective effects of RFS and any applicable tolerances in determining guaranteed control of the center point, feature axis, or feature center plane. See Figs. 2-12 through 2-17.

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