
Waterfall Model | 205
cies and screen shots. You re-examined your requirements and watched them come
to life through five prototype iterations and constant security updates. You trained
your personnel on its use, tested its performance, and made final adjustments before
implementation. Your own standalone system that met your needs was installed and
fully operational on the Friday before you opened the clinic doors on Monday, 1 day
ahead of schedule. You are continuing to evaluate and modify the system, but that
is how the SDLC works: it is never finished, but rather constantly evolving.
WATERFALL MODEL
The waterfall model is one of the oldest methods ...