The primary objective of this study is to find the role of different policies on supply chain performance (SCP). To achieve this objective, quality assurance policies (QAP) and continuous process improvement (CPI) are selected as independent variables. Additionally, the moderating effects of environmental regulations and policy (ERP) are examined between various policies and SCP. ERP is taken as moderating variable because the role of ERP in logistics is crucial. Logistics transport has serious effect on environment due to the emission of CO2. Primary data are collected from supply chain companies of Indonesia. Three hundred questionnaires are used in this study and they are analyzed through statistical tests. Conclusion of the study shows that QAP and CPI had major role in SCP. Better implementation of QAP and CPI increase the SCP among Indonesian supply chain companies. Moreover, ERP is a moderating variable between the relationship of QAP and CPI and SCP. Therefore, Indonesian supply chain companies should enhance the policies related to quality assurance, process improvement and environmental policies to enhance SCP.