in the sdlc we have these phases
1. initial phase
2.analysis phase
3.designing phase
4.coding phase
5.testing
6.delivery and maintainance

    in the initial phase project manager can prepare a 
document for the requirements, team leader will prepare a 
team which is having  test engineers, developer will 
provided by the project manager, testee will prepare test 
cases for that particular project

   analysis phase all the members have a meeting to 
finalise the technology to develop that project, the 
employee, time ,...

   in the designing phase the project manager like senior 
level management will give the directions and source code 
to the team members to develop the actual code, that is 
guidelines will be given in this phase

    in the coding phase developer will develop  the actual 
code using the source code and they release the application 
to the testee

 in the testing phase they deploy their test cases to that 
application and prepare a bug profile document if there is 
any defect/bug in that application and send it back to 
developer, developer may rectify and releases tha 
application as nezt build and if the bug not undestand it 
will send to the prject lead

   in the delivery phase the sr test eng can deploy the 
application in the client environment 

  maintainance phase if the client get any prblem with the 
application it may solved by the prject lead withe help of 
testers and developers

this is the story

Thankyou  Susmitha