The next major phase in software development life cycle (SDLC) is  testing. Quality assurance methods and testing help support this phase.

and Internet for information on the various  tests that should be performed at different junctures of development and  integration. Research software-related quality assurance tools as well.  

• Compare and contrast at least 4 tests that occur between the  span of development and final integration into a production environment  (description of each and how they support overall quality of the system  or application).