Sharing the architectural knowledge of architectural analysis among stakeholders proves to be troublesome. This causes problems in and with architectural analysis, which can have serious consequences for the quality of a system being developed, as this quality might be incompletely or wrongly assessed. This paper presents a domain model, which can be used as a common ground among analysts and architects to capture and explicitly share such knowledge. This enables a way to overcome some of the obstacles imposed by the multi-disciplinary context in which architectural analysis takes place. To apply the domain model in practice, we have created a tool implementing (part of) this domain model for capturing and using explicit architectural knowledge during analysis. We validate the tool and domain model in the context of an industrial case study.