E-Business is clearly the wave of the future, and with it, Business Process Reengineering (BPR). At the same time, Enterprise Resources Planning System (ERP) comes into vogue by integrated information system. The aim of this study is to analyze ERP implementation based on case studies candidates for business resource. Making a comparison of the performance of those two enterprises candidates on each case study complete this, and to examines the empirical evidence to date, in particular by examining survey research to understand the results between the self-developing and buyout respectively.