This paper compares the business benefits achieved by two companies from their ERP systems. The Shang and Seddon enterprise system benefit framework was used to determine the business benefits. Some of the issues with the comparison of case studies of ERP systems are discussed within the context of the findings. There is a discussion of the reasons why one company achieved more business benefits than the other. The paper concludes with a model proposing that ongoing education, training and support and change management in the post implementation period increases the skills and abilities of business managers and users. This will have an influence on efficient and effective use of the system and business process improvement, hence maximizing the business benefits an organisation gains from its ERP system.