The 4th Asia Symposium on Quality Electronic Design (ASQED 2012) is the fourh event organized by the International Society for Quality Electronic Design in Asia. This event is co-organized and managed by SHRDC. ASQED strives to bridge the gap among Electronic/Semiconductor ecosystem members providing electronic design tools and processes, integrated circuit technologies, processes & manufacturing, to achieve design quality. The conference emphasizes innovations and the latest developments in IC and system Design, EDA, Semiconductor Process Technology, IC Packaging, Test, and Manufacturing communities. ASQED spans two days, in three parallel tracks, hosting over 60 technical presentations, several keynote speakers, tutorials and other informal meetings. Conference proceedings will be published by IEEE and posted in the digital library.