Abstract
ERP vendors are rapidly updating their systems with emerging technology every year. Many companies are trying to catch up with the speed by upgrading their current ERP systems. Although various IS acceptance models, including the TAM model, were developed to understand the ERP end-users' behavioural intention, few studies have examined the effects of familiarity from a user perspective. This study focuses on usability issues of current ERP systems and gains an in-depth understanding of familiarity in the context of ERP continuance usage. We collected data from a user practice experiment to investigate how this cognitive and affective factor, familiarity, is interrelated with ERP users' continuance intention. The results support the criticism of TAM and show the importance of familiarity as an additional critical construct to the context of ERP adoption. Implications for both academic research and practice, as well as suggestions for future studies, are discussed.