GD&T Tolerance Analysis – Profile

In this Question Line video, Jason answers the following question regarding the use of the profile callout: 

How does a profile callout on Datum C of a rectangular prism affect the allowed range for the basic distance to the opposite side?

In this video, Jason walks through the drawing shown above, which includes two profile of a surface callouts on opposite sides of a rectangular part. The question came with three possible interpretations, and Jason explains what each one is missing. He then guides us through the correct interpretation, clarifying how the feature control frames define the location and orientation of the tolerance zones relative to the theoretical datums—not the actual datum features. 

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