Life cycle of sdlc

The systems development life cycle (SDLC) is a 5 phase process which are 1. define system say for example your doing a project in a book and it tells you what and how you got to do it. 2. Determine requirements like the roles or resources who is gonna do what. 3. Design system components who is the builder, who is the artist, how much you will need to build or make your project. 4. Implement the system put what you have done and try it out and see how well it works, change process and repeat, whats the criticism about it. 5 Maintain system repeat the activity, do a assessment, train more people, and as always change what needs to be changed if needed.