3. Research methodology
3.1. Questionnaire development
The research collects empirical data by administering questionnaire survey to environmental management representatives among E&E manufacturing firms in Malaysia. The survey instrument is developed based on validated measurements found in reverse supply chain, GSCM and environmental management literatures. The opinions from industry expert are sought to elevate the relevance and coherence of measures in representing examined concept (Babbie, 1990; Sekaran, 2003). Nineteen items are applied to measure green product design (Desai and Mital, 2003;