Summary: Architecture definition requires architects who are highly qualified in both the use of architectural patterns and the analysis of the application’s requirements. This is because they have to identify what patterns satisfy the application’s functional requirements (FR) and quality attributes (QA), and the interrelationships between them. However, since QAs and FRs are usually addressed separately, their interrelationships are not detailed in full. This situation means that the architect has to expend considerable effort on their identification, with the risk of misinterpretations that lead to an inappropriate choice of patterns. We here present a model that allows the FRs to be marked with the constraints imposed by the QAs. The marks are conceived to be re-used during the architecture definition. The model brings knowledge of the requirements and their relationships closer to the architect, allowing patterns aligned with the requirements to be identified with less effort.