How a requirement or specification is changed once it has been frozen at a gate. The change is traced to every requirement, interface, design block and test it touches, judged against the frozen interfaces and safety requirements, and approved at the level that matches its reach. The specification is then reissued as a new controlled version and every downstream plan is brought into line.
A requested change is traced to affected requirements and assessed, routed to the board if it touches a frozen interface or safety requirement, and lands as a new specification version that drives plan and test updates.
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