Data Flow Modelling
The above system, presented in text, is quite simple to follow, but for large systems, text can become almost incomprehensible. Fortunately SSADM comprises tools that allow us to show the system graphically. This makes it much easier to show the three views mentioned earlier.
We have already seen that the methodology works by documenting the current system and then creating the required system. But it also considers the system representation to be physical and logical.