Software development life cycle sometime reffer to as system development life cycle and abbreviated as SDLC. A life cycle and abbreviated as SDLC. A life cycle model precribed the different activities that need to carried out to develop a software product and the sequencing this activities. A software life cycle model is a descriptive and dragramatic representation of the software life cycle.

The various life cycle model are as follows.

1)  Waterfall Model
2)  Spiral Model
3)  RAD (Rapid Application development)
4)  Proto typing  Model