Case Analysis of Lockout/tagout
The night shift received a work task to clean a mixing and stirring container. The shift supervisor asked the main operator to complete the "locking" work. The main operator Lockout/tagout the starter at the motor control center and confirmed that the motor had not started by pressing the start button. He added a lock to the start-stop switch box near the container and hung a warning sign that read "Danger - Do not Operate".
Subsequently, the shift supervisor issued a permit for operations in confined Spaces, and the two workers then entered the container for cleaning. The restricted space permit needs to be reissued for the upcoming day shift. When they tested the start button on the start-stop switch box, the stirrer started! The motor wasn't locked at all!
What should be done?
Strictly implement the corresponding safety procedures. Don't take shortcuts and don't delegate your responsibilities to other people.
Keep pace with the changes in your factory. Understand what kind of changes have occurred and how these changes might affect your work.
Use the change management program to ensure that all decommissioned devices have been clearly identified and not confused with the currently used devices.
Once there is an uncertain situation, consider cutting off the power supply.
Inspections and rechecks should be carried out, especially when it comes to safety matters, reconfirmation is necessary. Inspect the work area to determine if there are any abnormal situations.