Answer:
Actual duration
Step-by-step explanation:
Actual duration is part of project data. It is used in measuring the quantity of time or days set so far on a particular project or task. It considers the project duration, the amount of time spent so far, and the remaining time set out in the project duration.
To value the project progress and know the remaining project duration, the Actual duration is less from the project duration => Remaining Duration = Project Duration - Actual Duration
The result can also be used to measure the labor costs.