The more ways you can represent a problem, the more perspectives you get to solve it

Here are some diagrams you can use to frame a problem from different angles:

• Block diagrams to illustrate concepts built by objects, their attributes and interrelationships.
• Flow diagrams to describe the steps on a process, their connections and flow conditions.
• Venn diagrams to highlight how different concepts or objects relate or connect.
• Hierarchy diagrams to draw the relation between people, places and concepts.
• Mind maps illustrates the connections between concepts, objects, ideas, channels, people, and places within a particular context.

More tools and a whole process explained at:

Practicing IA - Abby Covert, Information Architect