Control

Control is a universal managerial process to ensure that all key operational processes are stable over time, and to prevent adverse change to ensure planned performance targets are met.

Definition

According to Juran's Quality Handbook by Defeo (7th edition),

Control. A universal managerial process to ensure that all key operational processes are stable over time, and to prevent adverse change to ensure planned performance targets are met.

According to Cost Accounting by Horngren, Datar, Rajan (14th edition),

Control. Taking actions that implement the planning decisions, deciding how to evaluate performance, and providing feedback and learning that will help future decision making.

According to Looking Out, Looking In by Adler, Proctor (15th edition),

Control. The social need to influence others.

According to the ITIL Foundation 4e by Axelos,

Control. The means of managing a risk, ensuring that a business objective is achieved, or that a process is followed.