In a recent conversation with James Chew, Senior Global Group Director, Aerospace and Defense, Cadence Design Systems and Chairman of the National Defense Industry Association Science and Engineering Technology Division and Charlie Schadewitz, Vice President of Aerospace and Defense at Cadence Design Systems, I learned that in many aerospace and defense applications, it’s more likely that digital twins – if they are employed at all — are used after the prototyping phase to refine or fix designs after they already exist in the real world. In aerospace in particular, a “fly-fix-fly” philosophy is often employed, which seems backwards to a chip-head like me.