Abstract: “Software has become the necessity part of modern society. There are several software development methodologies in use today. Software development models basically fall into two categories that are heavyweight and lightweight. Heavyweight methodologies are traditional methodologies such as Waterfall, Spiral, Iterative, RUP (Rational Unified Process) and lightweight are agile methodologies such as Feature Driven Development, Scrum, XP etc. This paper deals with unfolding Traditional methodologies- Waterfall model and Agile methodologies-Feature Driven Development with their advantages and disadvantages.”

Keywords: Terms—SDLC, Phases of SDLC, Heavyweight methodologies, Lightweight methodologies, Waterfall model, Feature Driven Development