Make the via decision answer a real design constraintA route decision starts with a documented constraint and compares alternatives. No technology is automatically the most reliable or the lowest-cost choice for every board.Make the via decision answer a real design constraintCompare complete constructions, not feature namesStart with the taskDense surface escapeInternal routing connectionLong unused barrelNo demonstrated constraintThen compare the routeBlind construction / revised fanoutBuried subassembly / other layer planBackdrill / span or routing changeSimpler through-via baseline³Ô¹Ïtv · Engineering illustration · Conceptual, not to scale