Requirement Engineering A. Requirement Engineering Requirement engineering is a fundamental aspect of the software development process, focusing on understanding and documenting what needs to be built. It encompasses several critical phases, particularly emphasizing the definition phase, where system services and constraints are established. Requirement engineering has four phases namely; Vision: This phase deals with the key issue of why the system is required to be developed. The first step involves development of business objectives, and the second step involves having an appreciation of the environment in which the software is going to run. Definition: This phase explains what should be constructed to address the system and again revolves around the specification of the system requirements without reference to implementation considerations. It states about the expected service, features, and constraint of the software. Development: Here, the design of the system and the integr...