What is Lockout tagout? Why do we follow the Lockout tagout process?

The 8 steps of Lockout tagout and the special cases of Lockout Tagout:
Lockout tagout's 8 steps:
Prepare ahead of time: Know the power source of the device and prepare to turn it off;
Clean up the site: do not leave irrelevant personnel and equipment in the work area
Timely communication: inform relevant personnel who may be affected by equipment isolation;
Shut down equipment: power off or clean up residual chemicals, and place labels;
Energy isolation: Complete energy isolation, and personally take care of the key of the locking device;
Release energy: Release dangerous energy stored in equipment, such as storage pressure, gas and residual chemicals
Verify: Make sure the above steps are complete and effective
Start a task
Lockout tagout is not simply a few locks and tags, it is a planned procedure or safety system to ensure that all the dangerous energy involved in the work is cut off, so as to avoid the operator or other personnel because of the operation of equipment or contact with the energy and face related risks.