Discovering early aspects

Aspect-oriented software development has focused on the software life cycle's implementation phase: developers identify and capture aspects mainly in code. But aspects are evident earlier in the life cycle, such as during requirements engineering and architecture design. Early aspects are concerns that crosscut an artifact's dominant decomposition or base modules derived from the dominant separation-of-concerns criterion, in the early stages of the software life cycle. In this article, we describe how to identify and capture early aspects in requirements and architecture activities and how they're carried over from one phase to another. We'll focus on requirements and architecture design activities to illustrate the points, but the same ideas apply in other phases as well, such as domain analysis or in the fine-grained design activities that lie between architecture and implementation