A software development lifecycle (SDLC) consists of several key phases, including planning, analysis, design, implementation, testing, deployment, and maintenance. These phases outline the process for developing software applications, helping teams manage and control the project from inception to completion. Each stage has specific objectives and deliverables, ensuring thorough documentation and quality assurance. Following an SDLC framework promotes effective collaboration among team members and supports consistent delivery of high-quality software products. Adopting SDLC methodologies, such as Agile or Waterfall, assists organizations in optimizing their development processes.