Which of the following types of control is applied when the work is in progress?

The correct answer is: C. Concurrent control.

Concurrent control is a type of control that is applied while the work is in progress. It is used to ensure that the work is being done correctly and that any problems are identified and corrected as soon as possible. Concurrent control can be applied in a variety of ways, such as through inspections, audits, and reviews.

Feedforward control is a type of control that is applied before the work begins. It is used to prevent problems from occurring in the first place. Feedforward control can be applied by identifying potential problems and taking steps to avoid them.

Feedback control is a type of control that is applied after the work is completed. It is used to evaluate the results of the work and to make changes as needed. Feedback control can be applied through surveys, interviews, and focus groups.

Regular control is a type of control that is applied on a regular basis, regardless of whether the work is in progress or not. It is used to ensure that the work is being done according to the established standards. Regular control can be applied through inspections, audits, and reviews.

In conclusion, concurrent control is the type of control that is applied when the work is in progress. It is used to ensure that the work is being done correctly and that any problems are identified and corrected as soon as possible.