Model :- A model is a representational abstraction containing a set of logical and quantitative relationships between the members of a set of variables or primitives. An important reason behind constructing a model is that it helps to manage the complexity in a problem and facilitates arriving at good solutions and at the same time helps to reduce the design costs. A model helps to understand the problem easily. Life cycle process: - A life cycle model specifies the different activities that need to be performed to develop a software product and the sequencing of these activities. The software life cycle is also sometimes called as the systems development life cycle (SDLC). Basically, the classical waterfall model is the basic life cycle customer. This is called product conception. Starting with his stage it undergoes transformation through a series of identifiable stages until it is fully developed and released to the customer. After release, the product is used by the customer and