In recent years, there has been a growing concern about enterprise resource planning (ERP) implementation in small and medium-sized enterprises (SMEs). In this study, we investigate the relationship among ERP software quality, vendor support, user information satisfaction, and performance of ERP implementation. The empirical findings of this paper will allow SMEs to identify the importance of relationships with vendors and software itself for the successful implementation of ERP systems. The results provide a useful basis for the SMEs which have limited information capability to focus their attention on the software quality and vendor support in overcoming difficulties and obstacles facing the ERP implementation.