The “Hera Group supplier qualification and assessment” procedure was reviewed in 171 determination of the candidature channels to the Group orders, the qualification of these candidatures aimed at inclusion in its suppliers list, the maintenance of the list by means of systematic checking and up-dating of the requisites of those enrolled, the audit on the suppliers, the periodic appraisal (rating) of the supplier, the renewal of the supplier list via clear access, permanence and cancellation rules.