This research examines the relationship between the organizational factors (such as justice and organizational climate) and behaviors regarding the implementation of enterprise resource planning (ERP) system. Business Process Reengineering (BPR) is emphasized due to its essentiality to ERP success and the symbiotic relationship. There has been much research that has focused on the relationship between justice and business process reengineering, as well as the relationship between BPR and ERP success in separate manners. However, few studies have explored the interrelationships among these constructs. This research helps explain how the organizational climate and organizational justice impacts the likelihood of success of an ERP implementation. While organizational behaviors under involvement are significantly and positively correlated with the success of ERP, justice plays an important mediating role in affecting individual’s attitudes towards organizational changes induced by BPR and ERP implementation.