SP Element 2 in ISA/IEC 62443-2-1 focuses on Configuration Management, with the asset inventory baseline as a foundational requirement.
Step 1: Purpose of an inventory baseline
The inventory baseline documents all hardware, software, firmware, and configuration items that make up the IACS. This establishes a known, trusted state of the system.
Step 2: Architecture visibility
By maintaining this baseline, the asset owner gains a clear and accurate understanding of the IACS architecture, including system components, versions, and dependencies.
Step 3: Why other options are incorrect
Physical access control and user authentication are addressed in different SP Elements. Event management detects anomalies, but it relies on the inventory baseline rather than replacing it.
Thus, the primary reason is to document IACS architecture.
