4 : Factory uses a root cause analy

4 : Factory uses a root cause analysis system/method to perform analysis of non-conformity data, provides correct actions and subsequent preventative actions. Factory uses statistical methods (pareto charts/curve chart and etc.) to stratify defects with sequent to identify related action plan.3 : Factory uses a root cause analysis system/method to perform analysis of non-conformity data, provide correct actions and subsequent preventative actions. No statistical methods adopted to stratify defects.2 : Factory performs root cause analysis of non-conformity data, only provides corrective action without preventative action.1 : Factory has corrective actions on non-conformity/defects, without root cause analysis and follow up actions.0 : Factory does not take corrective actions/necessary steps on handling non-conformity.