Requirement specification a formal process that seeks to Requirement Specification understand the problem and document in detail what the analysis software system needs to do. This System phase involves close interaction Design between users and designers -Implementation Most of the examples in this book- Testing simple, and their requirements are clearly stated. In the real world, Deployment however, problems are not well defined. You need to study a problem Maintenance carefully to identify its requirements Liang, Introduction to Java Programming, revised by dai-kaiyuLiang,Introduction to Java Programming,revised by Dai-kaiyu 4 Requirement Specification Requirement Specification System Analysis System Design Testing Implementation Maintenance Deployment A formal process that seeks to understand the problem and document in detail what the software system needs to do. This phase involves close interaction between users and designers. Most of the examples in this book are simple, and their requirements are clearly stated. In the real world, however, problems are not well defined. You need to study a problem carefully to identify its requirements