Writing specifications engineers can implement and verify: architecture specs, micro-architecture specs, register maps, datasheets and interface contracts that are unambiguous, testable and versioned — the discipline codified in ISO/IEC/IEEE 29148 and INCOSE requirements guidance.
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Note from the research register: Architecture, systems engineering or product definition role; learned by having your own specs torn apart in review and by verifying against someone else's ambiguous spec.
Register version 1.