Which of the following is NOT a responsibility of a train dispatcher?

The role of a train dispatcher primarily focuses on the safe and efficient movement of trains within the network. This includes responsibilities such as routing trains, coordinating communications, and monitoring train movements, which are all essential for maintaining safety and efficiency on the tracks.

In contrast, managing crew schedules on board the trains is typically the responsibility of a different department, often referred to as crew management or scheduling. This department focuses on crew assignments, work hours, and compliance with regulations regarding crew time. Therefore, since managing crew schedules is outside the typical scope of a train dispatcher's duties, selecting this option accurately reflects the correct answer to the question.