The theme of this research is to establish how South African companies evaluate the benefits of a capital investment, in terms of ERP implementations, to the organisation. The question of whether determinable value can be quantified and the methods used to calculate such value is explored. A search is conducted for critical success factors for successful ERP implementations, key metrics used for monitoring results, and the approach of South African companies to determining benefits. The research is designed to establish what post purchase analyses of completed projects are conducted and what percentage of completed implementations are considered successful in the South African environment, as well as the possible reasons for those successes and failures. The research consists of firstly a qualitative study of the goals of value creation of ERP decisions, which included a couple of interviews with IT and Process Engineering consultants to form a basis of knowledge for why companies implement ERP systems in the first place, followed by a quantitative descriptive study of the implementation success factors and post implementation analysis, by means of a survey of South African companies. The outcome of the research shows that ERP in South Africa has matured to a level where the majority of projects are judged by the key decision makers to be successful, in contrast to expectations created by the literature review performed. It also highlights that, in the capital budgeting decision making processes followed by companies of different sizes, qualitative factors play a slightly bigger role than quantitative factors in the motivation of an ERP implementation. In addition, this research concludes that companies who identify a clear business value goal with the proposed ERP implementation, ensures buy-in from top management, perform proper planning before embarking on the project, as well as follow some kind of rigorous measurement framework, experience higher levels of ERP success than those who do not. Copyright / Dissertation (MBA)--University of Pretoria, 2010. / Gordon Institute of Business Science (GIBS) / unrestricted