Many of the problems associated with business information systems projects are due to a poor definition of requirements in any of the following areas: business, stakeholder, solution and transition. This unit examines the core concepts and practical techniques necessary to ensure accurate and complete requirement specifications in today's rapidly changing business environment. Emphasis is placed on identifying the need for information systems within the business and ensuring that the resulting systems provide benefit to the business in meeting defined goals and objectives while satisfying the requirements of stakeholders. Students learn to model system requirements using a "traditional" approach, which includes process and data modelling, and an "object-oriented" approach, which includes modelling with the universal modelling language (UML).