Differential Equations Flow-chart/genealogical diagram? There are many methods to solve differential equations. There are many kinds of equations, different orders, linear, non-linear, homogeneous, exact, the other kind of homogeneous etc.
I would like to know of any diagrams that organize equations in to families by the best suited solution method. Or maybe a genealogical diagram, or even a flow chart. Something that gives the "big picture" on all these methods and types of equations.
Is there any such digram?
If not how would you organize it?
(the goal is for the diagram to assist one in choosing a method for solving, while at the same time clarifying the similarities and difference between equations. Something like the diagram that shows the real, imaginary, natural  and complex numbers, perhaps:

Of course it would be more complex... and it might fill a wall, but I'm OK with that.

Maple's help page for the odeadvisor command contains a list of many different types of differential equations, each constituting a link to a page that describes that type of equation and (in many cases) its solution.
