" Developing product service system model for providing Led which the bulb is non-toxic & environmental friendly with easy accessibility for reducing electricity usage in Korea."

• Research purposeAnalyze elements of the NUI that are currently being used in smartphones, tablets, wearable devices, and present guidelines and suggest new interactions based on them.

• Research characteristicAnalysis needs (user interview and documentary survey)Draw PSS solution (create sustainable product service system model)Assessment PSS (validity of solution through participant’s interview and workshop)

• Research conclusionProduce sustainable service system (PSS) solutions for LED penetration and maintenance based on needs of stakeholders.