Source:-https://www.dqindia.com Software development is both a science and an art. The science involves models, methods, and procedures that have been shown to be useful and correct. The art is weaving together these methods for a given situation, a given problem, a given set of programmers, and a given client, to deliver on the project’s promises. Thus the software industry has evolved with twin personas – the formal models side and the actual practices side. There are those who adhere strictly