Which of the following correctly orders the IEC 62443 numbering groups from organizational scope toward the most granular technical scope?
- A.Component (4-x), System (3-x), Policies/Procedures (2-x), General (1-x)
- B.System (3-x), General (1-x), Component (4-x), Policies/Procedures (2-x)
- C.Policies/Procedures (2-x), Component (4-x), General (1-x), System (3-x)
- D.General (1-x), Policies/Procedures (2-x), System (3-x), Component (4-x)
Why D is correct
The series progresses from 1-x (general concepts), to 2-x (policies and procedures), to 3-x (system level), and finally 4-x (component level), moving from broad organizational context toward the most granular technical product requirements. This progression reflects the deliberate role-based and lifecycle layering of the standard.
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