What is the difference between SDLC and STLC?

Well, obviously there are a number of clear differences between SDLC (Software Development Life Cycle) and STLC (Software Testing Life Cycle).

Perhaps the most significant difference is that SDLC is a process followed for developing software, whereas STLC is a process followed for testing software. SDLC includes steps like requirement gathering, design, coding, testing, and maintenance, whereas STLC involves planning, preparation, execution, and reporting of testing activities.

In addition, a subsequent contrast would be that SDLC is a comprehensive process that covers the entire software development process, whereas STLC is a subset of SDLC that focuses solely on testing. SDLC considers the bigger picture, while STLC is concerned with verifying and validating the software.

Conversely, while SDLC is primarily focused on delivering high-quality software that meets customer requirements, STLC focuses on ensuring the quality of the software through testing. SDLC is concerned with the development process as a whole, whereas STLC is focused on the testing process.

The last difference could be that SDLC is a sequential process where each phase must be completed before moving on to the next, whereas STLC is an iterative process that may be repeated until the software meets the required quality standards. On the other hand, SDLC is a linear process that moves from one phase to the next, whereas STLC may involve repeating certain testing activities in order to identify and fix defects.

In summary, SDLC and STLC are two distinct processes that work together to deliver high-quality software. SDLC covers the entire software development process, while STLC focuses solely on testing. The two processes differ in their goals, focus, and approach to software development and testing.