Architecting and designing : IDEF : IDEF0
  
IDEF0
You can use IDEF0 to model your enterprise architecture.
See also
Introduction to IDEF0
About balancing IDEF0 context or constraint diagrams
Drawing with automatic geometry mode
Working with IDEF0 models
IDEF0 Context Diagram
IDEF0 constraint (decomposition) diagrams
Working with ICOM arrows
Node tree diagrams
Running rules check in IDEF0
Calculating cost in IDEF0 diagrams
Related Units of Behavior for a Function/Activity
Project data of a Function/Activity
IDEF