Which of the following fields of management focuses on establishing and maintaining consistency of a system's or product's performance and its functional and physical attributes with its requirements,

Configuration management is a discipline focused on identifying, documenting, and controlling changes to the functional and physical characteristics of a system throughout its lifecycle. Its primary goal is to ensure the consistency and integrity of the system's attributes with its design and requirements over time.

Procurement management deals with obtaining goods and services from external vendors, not with maintaining the internal consistency of a system's attributes.

Risk management focuses on identifying, assessing, and mitigating risks, not on ensuring the consistency of a system's performance and attributes.

Change management focuses on managing the process of organizational or system modifications, but configuration management specifically addresses the consistency of the system's defined attributes as a result of those changes.