In SDLC life cycle never stops untill the pplication/product
becomes outdated or obsolete.
One thing i want to clear you friends 

Typical SDLC phase looks like

 Requirement Gathering
        \
   Requirement Analysis
          \
       Design
           \         
          Coding & integration
             \
            Testing
               \
               Deployment
                 \
                maintanenece

The above Seven are the major and important SDLC Phases.
ofcourse one can think that after deployment of 
application/product in client enviroment development 
process will be ended.

But in real it never ends like that.After deployment client
may need some changes or some additions or some pathches 
to fix bugs or support.

So life cycle never ends until the product/application 
alive.

ok friends Byee

Rajendra Prasad

rajendra-penumalli@yahoo.com
hyd
9885162742

Priya if you agree that answer ok others wise give question 
once again
With clearly please.


My name is k.chandra sekhar
My phone no is 09246540049
I am in hyderabad
My mail id is ndra_143@yahoo.co.in 
If any body want full explain send that mail

Hi rajendra , 

    I too agree with your answer , but i want one small 

clarification from your end, why "water fall model" 

is only used by few organization . (most of the people are 

having Opinion  like, all the stages in this model are 

interdependend ,if one stage out put or input went wrong 

total project will colapse, do u have any idea on this.

hai rajendra this is abhinav 

 THE MOST OF THE COMPANIES USED WATER FALL MODEL WHY BECAUSE
IN THIS MODEL THE COST OF THE PROJECT IS TOO LOW WHEN
COMPARED WITH ANOTHER MODELS 
                 THIS MODEL IS USED WHEN THE CLIENT
REQUIREMENTS ARE CLEAR FOR THAT PROJECT