The 4th Asia Symposium on Quality Electronic Design (ASQED 2012) is the fourth event organized by the International Society for Quality Electronic Design with technical sponsorship from several IEEE Societies. This event is being co-organized and managed by SHRDC. ASQED emphasizes innovations and the latest developments in System and IC Design, MEMS & NEMS, Semiconductor Technology & Manufacturing, IC Packaging & PCB Technology, Test, and Bio & Nano Electronics.