This research examines what factors facilitate or inhibit the success of ERP projects. It uses a case study methodology to compare a successful ERP implementation with an unsuccessful one. Data was collected by conducting interviews at various levels of the subject organizations and by examining their archived records when available. The study proposes that worked with functionality, maintained scope, project team, management support, consultants, internal readiness, training, planning, and adequate testing are critical to a successful ERP project implementation and also dealing with organizational diversity, development, and budgeting are other important factors that are contributing to a successful implementation.