Software Architect's Handbook

Identifying cross-cutting concerns

As an initial step, software architects must be able to identify the cross-cutting concerns. By recognizing common functionality across modules and layers of the system, we can consider how concerns can be abstracted so that they are not duplicated. In some cases, the common functionality is identical among its different usages, while in others, refactoring may be involved to make the logic generic enough to be reusable.