from a quality and process assurance standpoint. It
does not, however, replace your chosen SDLC model.There are quite a few SDLC models that further refine
the generic process just described. They all use the same
core concepts but vary in terms of implementation and
utility for different projects and teams. The following are
some of the most popular SDLC models:
Waterfall
Lean
Agile
Iterative model
Spiral model
V model
Big Bang model
Prototyping modelsLuckily, you don’t need to know all of these for the 200-
901 DevNet Associate DEVASC exam. The following
sections cover the ones you should know most about:
Waterfall, Lean, and Agile.
Waterfall
Back in the 1950s, when large companies started to
purchase large mainframe computers to crunch
numbers, no one really knew how to run an IT
organization. It really wasn’t anything that had been
done before, and for the most part, computers were only
really understood by an elite group of scientists.
Programming a mainframe required structure and a
process. This caused a problem for businesses looking to
tap into the capabilities of these new systems since there
wasn’t a well-known method to create business
applications. So they looked around at other industries
for guidance.