SEDEX Audit | SMETA Audit | ETI Audit | SEDEX 2 & 4 Pillar SMETA Audit | Sedex four pillars: Labour, Health and Safety, Environment and Business Ethics. The Supplier Ethical Data Exchange (Sedex) is a not-for-profit membership organisation for businesses committed to the continuous improvement of ethical performance within their supply chains.  The aims of Sedex are to ease the auditing burden on suppliers through the sharing of reports and to drive improvements in supply chain standards.