An operating system having a shortcut touch panel having shortcut functions, wherein the operating system has an electronic device and a shortcut touch panel. A structure-based processing system organizes medical knowledge into formal structures and then executes those structures on a structure engine to automatically select the next question. The mounting plate forms a second engagement feature. The decoy traffic preferably comprises frames to which no response is needed. In this way, a through-hole of a given size can be formed without allowing reversely tapered crystal planes to appear from a surface of the substrate toward the inside of the through-hole. This assessment includes identifying failure modes, causes and effects, which are permuted to define risk items.