Which of the following refers to the total time taken by a unit during its hauling operation?

Cycle time refers to the total time taken by a unit during its hauling operation. This measurement includes not only the time spent moving or traveling from one point to another but also encompasses all the other activities associated with the operation—such as loading and unloading materials. By considering all these phases, cycle time provides a comprehensive overview of the efficiency of the hauling operation, which is crucial for analyzing performance and optimizing processes in sanitary engineering contexts.

On the other hand, operational time generally refers to the period during which a system is active and functioning, not specifically tied to the hauling process. Variable time can pertain to different contexts but does not accurately pinpoint the total duration of a hauling operation. Travel time exclusively addresses the distance covered and could omit other essential elements such as loading and unloading. Hence, cycle time is the most appropriate term for encapsulating the complete time expenditure for hauling activities.