We are already using another architecture framework (e.g., C4ISR, JTA, RM-ODP, TOGAF, etc.), what do we need IEEE 1471 for?
IEEE 1471 is not a replacement for these other standards; it is an organizing framework intended to supplement such standards, by providing specific content requirements on architectural descriptions. Annex D of the recommended practice addresses its relationship to IEEE/EIA 12207 Software life cycle processes and the ISO/IEC Open Distributed Processing—Reference Model (RM-ODP). The Open Group Architecture Framework (TOGAF) is also moving toward harmonization with IEEE 1471. Other standards can be similarly recast as additional normative restrictions on IEEE 1471 ADs. For example, the US DOD’s C4ISR Architecture Framework can be cast as requiring ADs to have three particular viewpoints selected, the viewpoints corresponding to the three C4ISR views (operational, system, and technical views). Seen this way C4ISR is an additional requirement placed on ADs for certain classes of system that facilitates the evaluation of those ADs from the perspective of the C4ISR group. This highlights th
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