Big Bang SDLC Model is a methodology for writing software development life cycle (SDLC) specifications. It is a framework that can be used to write specifications of software development projects, including both large and small projects. It was developed by the Big Bang Software Development Team at the University of California, Berkeley. The Big Bang team consists of software developers who are experts in different areas such as web development, mobile app development, and cloud computing. They were able to build a framework that can be applied to any kind of project regardless of its size or complexity level.