SDLC Misconceptions Corrected

Do I need a software development life cycle? What are the stages, phases, or steps of the SDLC? What is the difference between SDLC and Waterfall? What is the difference between SDLC and Agile?

I’ve seen questions and answers about the software development lifecycle that are rooted in misconceptions and misunderstandings. Too often, software development happens within frameworks that come with roles, responsibilities, and activities. The frameworks get in the way of common abstractions and commonalities, and misconceptions about the software development life cycle make it…