The document discusses the phases of the Systems Development Life Cycle (SDLC). It describes the key activities in each phase, including requirements gathering, feasibility study, design, coding/testing, implementation/testing, and maintenance. Requirements are gathered from managers and customers to determine who will use the system, what data should be input and output. The feasibility study further investigates technical and economic factors. The design phase converts requirements into structure. Coding changes the structure into programs. Implementation involves user training, site preparation, and file conversion. Maintenance is needed to keep the new system up to standards.