4.2 The key Deliverables of Operational Architecture

Chapter 4 – Understanding Interactions with Stakeholders: Operational Architecture
Let S be a system. The need architecture diagram of S is then a hierarchical exhaustive representation of all needs with respect to S, a need N1 being under another need N2 in this hierarchy if and only if one can logically deduce N1 from N22. In this last situation, one says then more precisely that N2 refines into N1, which explains why one speaks of a need refinement hierarchy...
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