Small companies, like their larger counterparts, need information systems to drive and measure their performance. Until now, only large firms had access to ERP technology, but the market is increasingly tapping into to the needs of small businesses. For many SMEs, however, the difficulty lies in navigating the choices available and defining their specifications for this type of information system, especially since few tools and methods exist to help them. This is why we have developed an enterprise modeling-driven method for needs specification: the information in a company’s business model is used to prepare its ERP Functional Specification.