Which Lean metric is calculated by subtracting non-operational time from total time?

The Lean metric calculated by subtracting non-operational time from total time is known as Net Available Time. This measurement focuses on the time that is genuinely available for productive work. It provides insight into how much time is actually usable after accounting for periods where operations are halted due to reasons unrelated to the actual workflow, such as breaks, maintenance, or other non-value-added activities.

In a Lean environment, understanding Net Available Time is crucial because it helps organizations identify opportunities for improvement and optimize resource utilization. By reducing non-operational time, teams can enhance their efficiency and increase the amount of time available for productive activities, ultimately leading to better performance and output.

The other potential answers, while related to time metrics in Lean practices, either focus on different aspects of the process or are defined in ways that do not directly apply to the concept of Net Available Time. For example, Cycle Time refers to the total time from the beginning to the end of a process, and Scheduled Work Time refers to the planned working hours without considering non-operational times. Downtime Deduction Time is not a standard term widely used in Lean metrics, making it less relevant in this context.