Business Structure Maps (known also as Complexity Maps) have now a new look and feel. The size of the nodes (variables) is now function of its importance, or footprint on the system as a whole. This makes reading maps much easier as it is immediately clear where the important things are and where to start solving problems. The larger nodes are where there is more leverage and this is where one needs to concentrate.
Numerous interactive examples of maps may be seen here.
Get your own maps here.