For small manufacturers, NIST 800-53 is usually too large to implement uniformly. In practice, you prioritize a subset of control families based on business risk, regulatory drivers, and existing controls. Access control, configuration management, incident response, and system & communications protection usually rank highest, but exact priorities depend on your assets, OT/IT mix, and integration maturity.

No. Under NIST Risk Management Framework, systems in the same organization do not have to implement an identical set of security controls. Each system’s controls are selected based on impact level, risk, mission use, and environment. However, regulated manufacturers usually standardize a baseline to reduce audit risk, simplify integration, and control lifecycle costs.