NERC Reliability Standard CIP-002-5.1
(BES Cyber System Categorization) serves an important purpose by requiring
functional entities to identify and categorize Bulk Electric System (BES)
Cyber Systems and their associated BES Cyber Assets.
To identify and categorize BES
Cyber Systems and their associated BES Cyber Assets for the application of
cyber security requirements commensurate with the adverse impact that loss,
compromise, or misuse of those BES Cyber Systems could have on the reliable
operation of the BES. Identification and categorization of BES Cyber Systems
support appropriate protection against compromises that could lead to
misoperation or instability in the BES.