While defining the enterprise architecture of an organization, it is essential to understand the various processes, functions and capabilities of the business. Recently came across the FEA Business Reference Model on Wikipedia. The simplicity of the diagram impressed me.
Every organization has different business areas or LOBs. Each business area has a set of business functions that it performs. A ‘Business Function Model’ describes these functional areas and sub-functions in a graphical representation. An example of a BFM can be found here.
Each LOB executes its business functions by following certain business processes. A business process is an orchestration of different business activities and tasks that may be exposed as SOA services.