The System Development Life Cycle (SDLC) outlines six main phases for developing hardware and software systems: planning, analysis, design, implementation, support, and review. During planning, project requests are prioritized and resources allocated. Analysis involves investigating current systems and user requirements. Design develops system details and programs. Implementation builds the new system, trains users, and tests. Support provides ongoing assistance after deployment. Review assesses system performance after implementation. The SDLC aims to develop systems that meet user needs through documentation, testing, and stakeholder involvement at each phase.