1. Introduction
Enterprise Resource Planning (ERP) systems have beenconsidered as essential for gaining and maintaining
competitive advantage in the globalized market under ever increasing competition. ERP systems integrate and support
all the major processes of a company such as accounting, finance, manufacturing and human resource management, by
providing a unified platform of database and business applications (Chang 2006, Shang and Seddon, 2007, Ha and
Ahn, 2013). Because of those situations ERP is most popular choices to gain competitive advantage in complex
production systems. With this popularity the literature abound of many studies on ERP systems from various
approaches. However, despite the practical and academic interests in ERP, many companies still suơer from not being
able to gain the expected benefits from it, even initial success of ERP system implementation.
It has been discussed in literature that the initial implementation success, alone does not guarantee the successful
use of ERP after go-live (Deloitte 1998, Zhu et al. 2010). As a result, many companies struggle to achieve success
inthe post-implementation stage. In order to addressthe research gap, this study focuses specifically on the postimplementation stage of ERP and tries to structure a business improvement cycle model.