QEHSOperations
Lock-Tag-Try
The three-step verification that energy isolation is complete before working on equipment.
After applying lockout/tagout devices, the worker must attempt to activate the equipment ("try") to confirm all energy sources are isolated and the equipment cannot be energised. This is the critical last step of LOTO that prevents accidents from incomplete isolation. OSHA cites LOTO violations as one of the top 10 most frequently cited standards annually.