A term that is not associated with train crew's regular schedule is?

The term "Duty Cycle" is not typically associated with a train crew's regular schedule. It refers to the ratio of time a train is in operation compared to the total time it is available for service. This concept is often used more in operational analysis and efficiency studies rather than in the context of train crew scheduling.

In contrast, "Deadheading" refers to the practice of transporting crew members not actively engaged in their duties as part of their regular scheduling. "Limbo Time" can refer to the period where crew members are awaiting assignments, which is directly connected to scheduling. "Regular Reporting Point" is a defined location where crew members are required to report for duty as part of their schedules. These terms are integral to understanding train crew operations and scheduling, highlighting why "Duty Cycle" stands apart.