The implementation of Enterprise Resource Planning (ERP) system has grown rapidly world-wide in recent years. According to AMR Research, the globalization and centralization, and the performance management as the key drivers for continue ERP investment among the large corporations and small companies. Therefore measuring ERP systems success has been an important criterion for adopting organization. This paper presents a re-specification to DeLone and McLean's IS success Model and empirically examines it in ERP context. A conceptual model was proposed by the comprehensive review of IS success literature that attempted to evaluate the ERP system success.