The manual mode is useful for __________ a machine, because doing so in automatic mode would be dangerous.

The manual mode is most beneficial for troubleshooting a machine. This mode allows operators to take direct control of the machine's movements and functions, providing them with the ability to isolate issues, examine specific components, and assess the machine's behavior without the risk of automatic processes potentially leading to unsafe conditions. In situations where the machine may not be operating correctly or where there are concerns about safety, manual operation allows for careful assessment and intervention. This focused approach is essential for effective diagnostics, ensuring that any problems can be identified and resolved without the risks that automatic functions may pose.

While monitoring, testing, and programming can also be performed in manual mode, troubleshooting specifically requires a hands-on, controlled approach to identify and remedy faults or concerns safely.