The thesis reports on research that investigated the critical success factors associated with the use of Business Intelligence as an extension of Enterprise Resource Planning (ERP) systems. Many companies have implemented ERP systems to enable them to better manage their core business processes and the associated transactions. To achieve a better understanding of these business processes companies are utilising Business Intelligence to analyse transactional data from their ERP system. The effective implementation and use of Business Intelligence can impact on a company’s performance. Accordingly, the factors that contribute to the successful implementation and use of Business Intelligence are critical to its impact on a company. The research investigates important questions that relate to the critical success factors associated with the implementation of Business Intelligence as an extension of an ERP system, the relevance of such factors as an extension of ERP system and whether some factors are critical than others.