In which scenario would you use a feedback control strategy?

A feedback control strategy is essential in scenarios where precise control is required because it continuously monitors the output of a system and adjusts inputs accordingly to maintain the desired setpoint. This approach allows for real-time corrections based on deviations from the desired outcome, ensuring the system can respond to changes and disturbances effectively.

In a feedback system, the output is compared to a reference or setpoint, and the difference (error) is used to modify the process inputs. This dynamic response helps eliminate variations and maintain precision, making feedback control particularly valuable in applications such as temperature regulation, pressure control in reactors, and speed control in motors, where close adherence to desired parameters is crucial.

In contrast, options that involve lack of real-time adjustments, predetermined variables, or entirely manual processes are less suited for feedback control. Such scenarios do not require the continuous monitoring and adjusting that characterizes feedback systems, as they inherently lack the need for precision and adaptability.