When to use DML Straightness

In this Question Line Video, Brandon answers the following question regarding Straightness: 

Should I be using DML Straightness instead of Surface Straightness?

Brandon walks through examples for both surface straightness and derived median line straightness, explaining how to correctly apply them and discussing design and inspection considerations. 

For more information regarding Derived Median Line Straightness, check out this article: Rule #1 and Derived Median Line Straightness. 

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