A lot of academic (and industrial) research is looking at architectural decisions. One of the ideas pursued is that by capturing and managing this type of information it can be reused. I guess in practice it means that if you need to make a similar decision in the future you can look at what you decided the last time. I myself also saw this as an appealing idea. But today it struck me that we really don't have recurring decisions when we work as architects at Volvo. I think that if we had there would no be any need of an architect at all.
What we do have is a long succession of architectural decisions, each with a new set of prerequisites. The task as an architect is to be able to extrapolate from what has been done previously and still maintain some sort of conceptual integrity. To preserve the "feel" or "vision" of the architecture while still fulfilling necessary functional and quality requirements (including cost) and operate within the constraints given by for example our organisation and what is available/possible form suppliers.
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