waterfall model

waterfall model is also called linear or sequential life cycle. it is used in software design life cycle(SDLC). In this model, the sequence is followed top to bottom (like a waterfall) according to the phrases. the phrases are as follows:

*Software Requirement  specification(SRS)                                                                        

*Analysis                                                                       

*Design

*coding

*Testing

*Maintaince

 

*SRS:

It is an intial step that comes before analysis,it is a complete description about the behaviour of software that includes the list of steps, user interaction, designing. it also contain constraints like(quality of software). 

*Analysis:

After srs submittion we have to analyse the software that will be designed is efficient and fulfil the requirement of user. And also estimate the cost that it will be economical or not.

*Design:

it is a process of problem solving and planning for the software solution. after finding all these problem then design the software on paper. in this step eork is not done practically.

*Coding:

after analysis,designing coding is done. In this step designing converted into practical.

*Testing:

after coding the final software will be tested. if any error occur in the software it will be rectify. after rectifying all errors its handover to the user.

*Maintainence:

this time software is in the market and after sending into market some environmental changes effect the software. that changes implemented in the software.