With the machine or equipment isolated from its energy source the next step of lockout/tagout is to actually lock and tag out the machine. It’s fair to say that this entire six-step process takes its name from this step.
During this step, the authorized employee will attach lockout and/or tagout devices to each energy-isolating device. The point is to apply the lockout device on the energy-isolating device in a way so it says in the “safe” position and cannot be moved to the unsafe position except by the person performing the lockout.
Tagout refers to applying a tag on the device as well. This tag includes the name of the person who performed the lockout and additional information.