When features are positioned the same way in multiple parts, using iFeatures containing layout sketches ensures accurate positioning. 
Use a layout sketch to position geometry. 
 Sketch Lines as Layouts 
-  Sketch lines at specific distances and angles, and then save as an iFeature. 
- Insert the iFeature sketch in a part, and then use the sketched geometry to position work planes. 
- Sketch features on the work planes. 
 Sketch Geometry or Points as Layouts 
-  Sketch geometry or points, and then save as an iFeature. 
- Insert the iFeature sketch in a part, and then project geometry into other sketches. 
- Use those sketches to position geometry or create work features.