This paper revisits the relationship between software architecture and requirements focusing on the case of selfadaptive

systems. The authors present their view of the state-of-the-art, including their own work, on both areas

and their contribution towards the development of selfadaptive systems. The authors support the claim that there is

no fundamental distinction between architectural decisions and architecturally significant requirements and discuss how

these claims are specifically appropriate for the case of selfadaptive systems. A discussion of the approach described

and challenges for the case of adaptive systems are also presented.