A business function is a group of activities that together completely support one aspect of furthering the mission of the enterprise. Each function describes something the business does, regardless of the structure of the organization.
The highest-level business functions deal with major areas of interest (that is, subject areas) in the enterprise. Most organizations group major activities into five to ten top-level business functions, such as Marketing, Finance, and Manufacturing.
A function that is not subdivided into functions, but into processes, is known as a primitive function.
Any description of a function explains the function does. It is valuable to include the purpose of the function in the description.
The description of a function never describe who, when, where, or how because such information is not fundamental to the existence of the function. Rather, those aspects reflect the approach of the business to executing the activities that make up the function.
In a CA Gen model, a function is the highest level activity (the root activity) in the Activity Hierarchy Diagram.
When producing an Information Strategy Plan, planners subdivide the top-level business functions into smaller, more focused, lower-level business functions. You perform this division of business activities into successively smaller elements in both the planning and analysis.
Continue dividing the activities until you have identified the lowest-level, most fundamental activities. We call these most fundamental activities elementary processes.
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