Lockout/Tagout is more than just putting a yellow lock on the main electrical disconnect to a machine or part of a machine. When you are done, there are 3 very important steps you must do when removing a machine from a Lockout/Tagout state:
THREE STEPS FOR RESTART
1. INSPECT – inspect the equipment to be sure that –
a. All tools and other materials are remove.
b. Machine is fully reassembled
c. Guards and other safety devices are reinstalled
2. NOTIFY – Be sure that –
a. All employees are safely positioned.
b. All affected employees are notified of the restart
3. REMOVE – Remove lockout devices.
Remember that only the person who put the lock on may remove it.
From <http://safetytoolboxtopics.com/LOTO/loto-more-than-a-lock-part-2.html>