This presentation will show how NASA KSC controls interfaces for Modular Product Architecture ( MPA ) using Locator Skeletons , Interface Skeletons , and Product Structure , to be combined together within a Motion Skeleton . The user will learn how to utilize skeleton models to communicate interface data , as successfully done at NASA KSC in their use of Motion Skeletons to control interfaces for multi - launch systems . There will be discussion of the methodology used to control design requirements through WTParts , and how to utilize product structure for non - CAD documents .