Organisations that have already made huge investment in Enterprise Resource Planning (ERP) systems now face the decision whether to continue maintaining the existing systems or to invest in upgrades. This paper uses an Irish organisation which has recently decided to upgrade its system, as its case study. Due to the expected cost, the high level of customisation of its existing system, its lack of confidence in newer upgrades available and the risk of business disruption, this organisation had avoided upgrading its ERP system since it was first implemented over twelve years ago. Now the company believes that an upgrade will enhance its competitiveness and align itself to its parent company’s system.