This study discusses the impact of IT governance on the routine operation and enhancement effectiveness in the ERP post-implementation phase. At this stage, at which an ERP system has been used to support a company's operations, the company needs to arrange for IT governance to be effective, because overall ERP benefits can only be achieved when the operating environment is supportive. Structure, process and relational mechanisms are important aspects of IT governance. This research is focused on the process aspect, which is closely related to the value achievement of an enterprise. The influence of two factors related to IT governance processes were investigated, namely IT business alignment and IT benefits management. The results of the study will provide companies with knowledge on how IT governance, particularly process-related issues, makes a contribution to the effectiveness of routine operations and enhancement during the ERP post-implementation stage. Furthermore, this knowledge can be used to help companies benefit fully from ERP implementation.