thanks for your interesting feedback.
I was thinking more about a less complex issue. In programming you have the possibility to create function graphs, e.g. in Visual Studio. These function graphs basically just tell you which function uses which function.
So lets say you have some equations in a mathematica notebook:
TotalArea = A1 + A2
A1 = a1 * b1
A2 = a2 * b2
then a graph might look like this:
So it is nothing very scientific..
Of course there is a difference between notebook variables and equation and actual functions defined in mathematica.
I hope that clarifies what I am looking for