IDEF0 diagram - Tunneled arrows

This IDEF0 diagram was redesigned from the Wikimedia Commons file: 18 Example of Tunneled Arrows.svg. [commons.wikimedia.org/wiki/File:18_Example_of_Tunneled_Arrows.svg] "Tunneled Arrows. Arrows that provide information at one level of decomposition but are not needed at another (parent, child) level." [classes.engr.oregonstate.edu/mime/fall2013/ie545-001/Slides/class%2001-3b%20IDEF0%201%20revised.pdf] The example "IDEF0 diagram - Tunneled arrows" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the solution "IDEF Business Process Diagrams" from the area "Business Processes" of ConceptDraw Solution Park.