System Architecture: Strategy and Product Development for Complex Systems, First Edition

5.2 Function in Architecture

Function

Function is what a system does. Function is about activity, in contrast with form, which is about existence. As indicated by Box 5.1, function involves operations, transformations, or actions. Performance (how well a system performs) is an attribute of function.

Box 5.1 Definition: Function

Function is the activity, operation, or transformation that causes or contributes to performance. In designed systems, function is the actions for which a system exists, which ultimately lead to the delivery of value. Function is executed by form, which is instrumental in function. Function emerges from functional interaction between entities.

Function is a product/system attribute.

Just as form has entities of form (objects) ...