What does "lockout/tagout" mean in the context of machine guarding?

In the context of machine guarding, "lockout/tagout" refers specifically to a safety procedure designed to ensure that machines are properly shut down and cannot be inadvertently restarted while maintenance or servicing is being performed. This process involves placing a lock on the energy-isolating device of a machine and attaching a tag that indicates the machine cannot be operated until the lock is removed. This is critical for protecting maintenance workers from unexpected machine startup, which can lead to severe accidents or injuries.

The focus on ensuring machines are not accidentally powered on again during maintenance is vital in workplaces where heavy machinery is used. Ensuring that this protocol is followed helps reinforce a safety culture and reduces workplace hazards significantly. The other options do not capture the core principle of lockout/tagout, which is centered around the control of hazardous energy and safe maintenance practices.